Is it possible write a string or log into the console?
What I mean
Just like in JSP, if we print something like system.out.println("some"), it will be there at the console, not at a page.
Or you use the trick from PHP Debug to console.
First you need a little PHP helper function
function debug_to_console($data) {
$output = $data;
if (is_array($output))
$output = implode(',', $output);
echo "<script>console.log('Debug Objects: " . $output . "' );</script>";
}
Then you can use it like this:
debug_to_console("Test");
This will create an output like this:
Debug Objects: Test
Firefox
On Firefox you can use an extension called FirePHP which enables the logging and dumping of information from your PHP applications to the console. This is an addon to the awesome web development extension Firebug.
http://www.studytrails.com/blog/using-firephp-in-firefox-to-debug-php/
Chrome
However if you are using Chrome there is a PHP debugging tool called Chrome Logger or webug (webug has problems with the order of logs).
More recently Clockwork is in active development which extends the Developer Tools by adding a new panel to provide useful debugging and profiling information. It provides out of the box support for Laravel 4 and Slim 2 and support can be added via its extensible API.
Using Xdebug
A better way to debug your PHP would be via Xdebug. Most browsers provide helper extensions to help you pass the required cookie/query string to initialize the debugging process.
Chrome - Xdebug Helper
Firefox - The easiest Xdebug
Opera - Xdebug
Safari - Xdebug Toggler
If you're looking for a simple approach, echo as JSON:
<script>
console.log(<?= json_encode($foo); ?>);
</script>
By default, all output goes to stdout, which is the HTTP response or the console, depending on whether your script is run by Apache or manually on the command line. But you can use error_log for logging and various I/O streams can be written to with fwrite.
Try the following. It is working:
echo("<script>console.log('PHP: " . $data . "');</script>");
As the author of the linked webpage in the popular answer, I would like to add my last version of this simple helper function. It is much more solid.
I use json_encode() to check if the variable type is unnecessary and add a buffer to solve problems with frameworks. There not have a solid return or excessive usage of header().
/**
* Simple helper to debug to the console
*
* #param $data object, array, string $data
* #param $context string Optional a description.
*
* #return string
*/
function debug_to_console($data, $context = 'Debug in Console') {
// Buffering to solve problems frameworks, like header() in this and not a solid return.
ob_start();
$output = 'console.info(\'' . $context . ':\');';
$output .= 'console.log(' . json_encode($data) . ');';
$output = sprintf('<script>%s</script>', $output);
echo $output;
}
Usage
// $data is the example variable, object; here an array.
$data = [ 'foo' => 'bar' ];
debug_to_console($data);`
Screenshot of the result
Also, a simple example as an image to understand it much easier:
$variable = "Variable";
echo "<script>console.log('$variable');</script>";
PHP and JavaScript interaction.
echo
"<div display='none'>
<script type='text/javascript'>
console.log('console log message');
</script>
</div>";
Creates a
<div>
with the
display="none"
so that the div is not displayed, but the
console.log()
function is created in javascript. So you get the message in the console.
I think it can be used --
function jsLogs($data, $isExit) {
$html = "";
$coll;
if (is_array($data) || is_object($data)) {
$coll = json_encode($data);
} else {
$coll = $data;
}
$html = "<script id='jsLogs'>console.log('PHP: ${coll}');</script>";
echo($html);
if ($isExit) exit();
}
# For String
jsLogs("Testing string"); #PHP: Testing string
# For Array
jsLogs(array("test1", "test2")); # PHP: ["test1","test2"]
# For Object
jsLogs(array("test1"=>array("subtest1", "subtest2"))); #PHP: {"test1":["subtest1","subtest2"]}
Some great answers that add more depth; but I needed something simpler and more like the JavaScript console.log() command.
I use PHP in a lot of "gathering data and turn into XML" in Ajax applications. The JavaScript console.log doesn't work in that case; it breaks the XML output.
Xdebug, etc. had similar issues.
My solution in Windows:
Setup a .txt file that is somewhat easily to get to and writable
Set the PHP error_log variable in the .ini file to write to that file
Open the file in Windows File Explorer and open a preview pane for it
Use the error_log('myTest'); PHP command to send messages
This solution is simple and meets my needs most of the time. Standard PHP, and the preview pane automatically updates every time PHP writes to it.
I find this helpful:
function console($data, $priority, $debug)
{
if ($priority <= $debug)
{
$output = '<script>console.log("' . str_repeat(" ", $priority-1) . (is_array($data) ? implode(",", $data) : $data) . '");</script>';
echo $output;
}
}
And use it like:
<?php
$debug = 5; // All lower and equal priority logs will be displayed
console('Important', 1 , $debug);
console('Less Important', 2 , $debug);
console('Even Less Important', 5 , $debug);
console('Again Important', 1 , $debug);
?>
Which outputs in console:
Important
Less Important
Even Less Important
Again Important
And you can switch off less important logs by limiting them using the $debug value.
Short and easy, for arrays, strings or also objects.
function console_log( $data ) {
$output = "<script>console.log( 'PHP debugger: ";
$output .= json_encode(print_r($data, true));
$output .= "' );</script>";
echo $output;
}
For Chrome there is an extension called Chrome Logger allowing to log PHP messages.
The Firefox DevTools even have integrated support for the Chrome Logger protocol.
To enable the logging, you just need to save the 'ChromePhp.php' file in your project. Then it can be used like this:
include 'ChromePhp.php';
ChromePhp::log('Hello console!');
ChromePhp::log($_SERVER);
ChromePhp::warn('something went wrong!');
Example taken from the GitHub page.
The output may then look like this:
function phpconsole($label='var', $x) {
?>
<script type="text/javascript">
console.log('<?php echo ($label)?>');
console.log('<?php echo json_encode($x)?>');
</script>
<?php
}
If you want write to the PHP log file, and not the JavaScript console you can use this:
error_log("This is logged only to the PHP log")
Reference: error_log
I think best solution is to use
error_log(content)
This is output
Edit 2022:
So I’ve discovered way better way and thats file_put_contents("php://stdout", content)
It writes without the logging info
There is also a great Google Chrome extension, PHP Console, with a PHP library that allows you to:
See errors and exceptions in the Chrome JavaScript console and in the notification popups.
Dump any type of variable.
Execute PHP code remotely.
Protect access by password.
Group console logs by request.
Jump to error file:line in your text editor.
Copy error/debug data to the clipboard (for testers).
Here is my solution, the good thing about this one is that you can pass as many params as you like.
function console_log()
{
$js_code = 'console.log(' . json_encode(func_get_args(), JSON_HEX_TAG) .
');';
$js_code = '<script>' . $js_code . '</script>';
echo $js_code;
}
Call it this way
console_log('DEBUG>>', 'Param 1', 'Param 2');
console_log('Console DEBUG:', $someRealVar1, $someVar, $someArray, $someObj);
Now you should be able to see output in your console, happy coding :)
Any of these two are working:
<?php
$five = 5;
$six = 6;
?>
<script>
console.log(<?php echo $five + $six ?>);
</script>
<?php
$five = 5;
$six = 6;
echo("<script>console.log($five + $six);</script>");
?>
I was looking for a way to debug code in a WordPress plugin that I was developing and came across this post.
I took the bits of code that are most applicable to me from other responses and combined these into a function that I can use for debugging WordPress. The function is:
function debug_log($object=null, $label=null, $priority=1) {
$priority = $priority<1? 1: $priority;
$message = json_encode($object, JSON_PRETTY_PRINT);
$label = "Debug" . ($label ? " ($label): " : ': ');
echo "<script>console.log('" . str_repeat("-", $priority-1) . $label . "', " . $message . ");</script>";
}
Usage is as follows:
$txt = 'This is a test string';
$sample_array = array('cat', 'dog', 'pig', 'ant', 'fly');
debug_log($txt, '', 7);
debug_log($sample_array);
If this function is used with WordPress development, the function should be placed in the functions.php file of the child theme and can then be called anywhere in the code.
Clean, fast and simple without useless code:
function consolelog($data) {
echo "<script>console.log('".$data."');</script>";
}
Short and simply with printf and json_encode:
function console_log($data) {
printf('<script>console.log(%s);</script>', json_encode($data));
}
I have abandoned all of the above in favour of Debugger & Logger. I cannot praise it enough!
Just click on one of the tabs at top right, or on the "click here" to expand/hide.
Notice the different "categories". You can click any array to expand/collapse it.
From the web page
Main features:
Show globals variables ($GLOBALS, $_POST, $_GET, $_COOKIE, etc.)
Show PHP version and loaded extensions
Replace PHP built in error handler
Log SQL queries
Monitor code and SQL queries execution time
Inspect variables for changes
Function calls tracing
Code coverage analysis to check which lines of script where executed
Dump of all types of variable
File inspector with code highlighter to view source code
Send messages to JavaScript console (Chrome only), for Ajax scripts
As of 2017, Firebug and hence FirePHP has been disabled.
I wrote some little modifications to the ChromePHP tool to allow seamless migration from FirePHP to Firebug for debugging via the console.
This article explains in clear easy steps
Migrate from FirePHP to ChromePHP in 5 minutes (without breaking existing code)
For Ajax calls or XML / JSON responses, where you don't want to mess with the body, you need to send logs via HTTP headers, then add them to the console with a web extension. This is how FirePHP (no longer available) and QuantumPHP (a fork of ChromePHP) do it in Firefox.
If you have the patience, x-debug is a better option - you get deeper insight into PHP, with the ability to pause your script, see what is going on, then resume the script.
I might be late for a party, but I was looking for an implementation of logging function which:
takes a variable number of comma separated arguments, just like javascript console.log(),
gives a formatted output (not just a serialized string),
is distinguishable from a common javascript console.log().
So the output looks like that:
(The snippet below is tested on php 7.2.11. I'm not sure about its php backward compatibility. It can be an issue for javascript as well (in a term of old browsers), because it creates a trailing comma after console.log() arguments – which is not legal until ES 2017.)
<?php
function console_log(...$args)
{
$args_as_json = array_map(function ($item) {
return json_encode($item);
}, $args);
$js_code = "<script>console.log('%c 💬 log from PHP: ','background: #474A8A; color: #B0B3D6; line-height: 2',";
foreach ($args_as_json as $arg) {
$js_code .= "{$arg},";
}
$js_code .= ")</script>";
echo $js_code;
}
$list = ['foo', 'bar'];
$obj = new stdClass();
$obj->first_name = 'John';
$obj->last_name = 'Johnson';
echo console_log($list, 'Hello World', 123, $obj);
?>
Here's a handy function. It is super simple to use, allows you to pass as many arguments as you like, of any type, and will display the object contents in the browser console window as though you called console.log from JavaScript - but from PHP
Note, you can use tags as well by passing 'TAG-YourTag', and it will be applied until another tag is read, for example, 'TAG-YourNextTag'
/*
* Brief: Print to console.log() from PHP
*
* Description: Print as many strings,arrays, objects, and
* other data types to console.log from PHP.
*
* To use, just call consoleLog($data1, $data2, ... $dataN)
* and each dataI will be sent to console.log - note
* that you can pass as many data as you want an
* this will still work.
*
* This is very powerful as it shows the entire
* contents of objects and arrays that can be
* read inside of the browser console log.
*
* A tag can be set by passing a string that has the
* prefix TAG- as one of the arguments. Everytime a
* string with the TAG- prefix is detected, the tag
* is updated. This allows you to pass a tag that is
* applied to all data until it reaches another tag,
* which can then be applied to all data after it.
*
* Example:
*
* consoleLog('TAG-FirstTag', $data, $data2, 'TAG-SecTag, $data3);
*
* Result:
* FirstTag '...data...'
* FirstTag '...data2...'
* SecTag '...data3...'
*/
function consoleLog(){
if(func_num_args() == 0){
return;
}
$tag = '';
for ($i = 0; $i < func_num_args(); $i++) {
$arg = func_get_arg($i);
if(!empty($arg)){
if(is_string($arg) && strtolower(substr($arg, 0, 4)) === 'tag-'){
$tag = substr($arg, 4);
}else{
$arg = json_encode($arg, JSON_HEX_TAG | JSON_HEX_AMP );
echo "<script>console.log('" . $tag . " " . $arg . "');</script>";
}
}
}
}
NOTE: func_num_args() and func_num_args() are PHP functions for reading a dynamic number of input arguments, and allow this function to have infinitely many console.log requests from one function call.
Though this is an old question, I've been looking for this. Here's my compilation of some solutions answered here and some other ideas found elsewhere to get a one-size-fits-all solution.
CODE :
// Post to browser console
function console($data, $is_error = false, $file = false, $ln = false) {
if(!function_exists('console_wer')) {
function console_wer($data, $is_error = false, $bctr, $file, $ln) {
echo '<div display="none">'.'<script type="text/javascript">'.(($is_error!==false) ? 'if(typeof phperr_to_cns === \'undefined\') { var phperr_to_cns = 1; document.addEventListener("DOMContentLoaded", function() { setTimeout(function(){ alert("Alert. see console."); }, 4000); }); }' : '').' console.group("PHP '.(($is_error) ? 'error' : 'log').' from "+window.atob("'.base64_encode((($file===false) ? $bctr['file'] : $file)).'")'.((($ln!==false && $file!==false) || $bctr!==false) ? '+" on line '.(($ln===false) ? $bctr['line'] : $ln).' :"' : '+" :"').'); console.'.(($is_error) ? 'error' : 'log').'('.((is_array($data)) ? 'JSON.parse(window.atob("'.base64_encode(json_encode($data)).'"))' : '"'.$data.'"').'); console.groupEnd();</script></div>'; return true;
}
}
return #console_wer($data, $is_error, (($file===false && $ln===false) ? array_shift(debug_backtrace()) : false), $file, $ln);
}
//PHP Exceptions handler
function exceptions_to_console($svr, $str, $file, $ln) {
if(!function_exists('severity_tag')) {
function severity_tag($svr) {
$names = [];
$consts = array_flip(array_slice(get_defined_constants(true)['Core'], 0, 15, true));
foreach ($consts as $code => $name) {
if ($svr & $code) $names []= $name;
}
return join(' | ', $names);
}
}
if (error_reporting() == 0) {
return false;
}
if(error_reporting() & $svr) {
console(severity_tag($svr).' : '.$str, true, $file, $ln);
}
}
// Divert php error traffic
error_reporting(E_ALL);
ini_set("display_errors", "1");
set_error_handler('exceptions_to_console');
TESTS & USAGE :
Usage is simple. Include first function for posting to console manually. Use second function for diverting php exception handling. Following test should give an idea.
// Test 1 - Auto - Handle php error and report error with severity info
$a[1] = 'jfksjfks';
try {
$b = $a[0];
} catch (Exception $e) {
echo "jsdlkjflsjfkjl";
}
// Test 2 - Manual - Without explicitly providing file name and line no.
console(array(1 => "Hi", array("hellow")), false);
// Test 3 - Manual - Explicitly providing file name and line no.
console(array(1 => "Error", array($some_result)), true, 'my file', 2);
// Test 4 - Manual - Explicitly providing file name only.
console(array(1 => "Error", array($some_result)), true, 'my file');
EXPLANATION :
The function console($data, $is_error, $file, $fn) takes string or array as first argument and posts it on console using js inserts.
Second argument is a flag to differentiate normal logs against errors. For errors, we're adding event listeners to inform us through alerts if any errors were thrown, also highlighting in console. This flag is defaulted to false.
Third and fourth arguments are explicit declarations of file and line numbers, which is optional. If absent, they're defaulted to using the predefined php function debug_backtrace() to fetch them for us.
Next function exceptions_to_console($svr, $str, $file, $ln) has four arguments in the order called by php default exception handler. Here, the first argument is severity, which we further crosscheck with predefined constants using function severity_tag($code) to provide more info on error.
NOTICE :
Above code uses JS functions and methods that are not available in older browsers. For compatibility with older versions, it needs replacements.
Above code is for testing environments, where you alone have access to the site. Do not use this in live (production) websites.
SUGGESTIONS :
First function console() threw some notices, so I've wrapped them within another function and called it using error control operator '#'. This can be avoided if you didn't mind the notices.
Last but not least, alerts popping up can be annoying while coding. For this I'm using this beep (found in solution : https://stackoverflow.com/a/23395136/6060602) instead of popup alerts. It's pretty cool and possibilities are endless, you can play your favorite tunes and make coding less stressful.
Use:
function console_log($data) {
$bt = debug_backtrace();
$caller = array_shift($bt);
if (is_array($data))
$dataPart = implode(',', $data);
else
$dataPart = $data;
$toSplit = $caller['file'])) . ':' .
$caller['line'] . ' => ' . $dataPart
error_log(end(split('/', $toSplit));
}
in start code...
error_reporting(-1);
ini_set('display_errors', 'On');
it work
Related
I'm designing a simple templating system for a CMS in PHP which internally currently uses something like:
require_once 'templates/template1.php`;
to import the desired template.
I would like every content {{field123}} in this PHP file to be automatically converted into <?php echo $row['field123']; ?> before being passed into require_once and executed by PHP.
Is there a way to activate a preprocessor (I know that PHP is already named after preprocessor) that does this replacement {{anything}} -> <?php echo $row['anything']; ?> before executing the PHP code template1.php? If not, what's the usual way to do this?
Having PHP code in templates - especially code with potential side-effects - can get dirty real quick. I would recommend using static templates, treating them as strings instead of executing them, then parsing them for tokens, with your main application compiling them and handling output.
Here is a rudimentary implementation that parses variables into tokens, and also handles mapped function calls in your templates. First, "fetching" our template (for a simple example):
$tpl = 'This is a sample template file.
It can have values like {{foo}} and {{bar}}.
It can also invoke mapped functions:
{{func:hello}} or {{func:world}}.
Hello user {{username}}. Have a good day!';
Then, the template parser:
function parse_template(string $tpl, array $vars): string {
// Catch function tokens, handle if handler exists:
$tpl = preg_replace_callback('~{{func:([a-z_]+)}}~', function($match) {
$func = 'handler_' . $match[1];
if(function_exists($func)) {
return $func();
}
return "!!!What is: {$match[1]}!!!";
}, $tpl);
// Generate tokens for your variable keys;
$keys = array_map(fn($key) => '{{' . $key . '}}', array_keys($vars));
// Substitute tokens:
$tpl = str_replace($keys, $vars, $tpl);
return $tpl;
}
These are our handler functions, with handler_X matching {{func:X}}.
function handler_hello() {
return 'HELLO THERE';
}
function handler_world() {
return '#Current World Population: ' . mt_rand();
}
Then, here are the variables you'd like to parse in:
$vars = [
'foo' => 'Food',
'bar' => 'Barnacle',
'username' => 'Herbert'
];
Now let's parse our template:
$parsed = parse_template($tpl, $vars);
echo $parsed;
This results in:
This is a sample template file.
It can have values like Food and Barnacle.
It can also invoke mapped functions:
HELLO THERE or #Current World Population: 1477098027.
Hello user Herbert. Have a good day!
Job done. You really don't need a complicated templating engine for something like this. You could easily extend this to allow the handlers to receive arguments defined in the template tokens -- however I'll leave that for your homework part. This should do to demonstrate the concept.
As mentioned in a comment and in How do I capture PHP output into a variable?, the use of output buffering can work:
<?php
ob_start();
?>
Hello
{{field123}} and {{field4}}
World
<?php // or require_once 'template1.php'; ?>
<?php
$s = ob_get_clean();
$a = array('field123' => 'test', 'field4' => 'test2');
$s = preg_replace_callback('/{{(.*?)}}/', function ($m) use ($a) { return isset($a[$m[1]]) ? $a[$m[1]] : $m[0]; }, $s);
echo $s;
?>
// Output:
// Hello
// test and test2
// World
Here we also used a method similar to Replace with dynamic variable in preg_replace to do the replacement.
I want to ask the user to locate a folder on the (windows) commandline.
Usually you'll be able to use autocomplete with the [tab] key.
But not if I ask this from a phpscript.
I use this class:
<?php
class CLQuestion
{
protected $_awnser;
protected $_options;
protected $_question;
public function __construct($question, $options = array())
{
$this->_question = $question;
$this->_options = $options;
$this->askQuestion();
$this->waitForAwnser();
}
protected function askQuestion()
{
echo PHP_EOL . $this->_question . PHP_EOL;
}
protected function waitForAwnser()
{
while (true) {
$response = strtolower(trim(fgets(STDIN)));
// are options given?
if (empty($this->_options)) {
// no options given, so the response is our awnser
$this->_awnser = $response;
break;
} else if (!empty($this->_options) && in_array($response, $this->_options)) {
// options given and found in options
$this->_awnser = $response;
break;
} else {
// options given and not found.
echo PHP_EOL . 'Please use one of these options: ';
echo PHP_EOL . " " . implode(PHP_EOL . " ", $this->_options);
echo PHP_EOL;
continue;
}
}
}
public function getAwnser()
{
return $this->_awnser;
}
}
With this usage:
<?php
$question = new CLQuestion('Where is you folder located?');
$question->getAwnser(); // path typed
Windows CMD will give me a way to interact, but when i use the [tab] key, it does not autocomplete but it show a tab.
Am I able to activate path autocompletion in some way?
autocompletion is a feature of a windows shell prompt.
When you run an application like:
php script.php
this application gains control over STDIN and STDOUT and magic shell features like autocompletion will work no more until this app finishes.
This for example allows you to run one shell inside another.
If you need autocompletion in your script, you will need to implement it yourself. Instead of reading whole line with fgets(STDIN) you could read it char by char with fgetc(STDIN) and when the char will equal "\t" you would have to list files in current directory with php functions and check witch paths are matching to what user have written till now. So you will basically have to re-implement fgets adding magic autocompletion feature.
But instead of doing this and implementing your own shell I guess it would be far more better to make the folder location a script argument:
<?php
if(empty($argv[1])) die("usage: php script.php folderpath");
echo "your folder is located at:" . $argv[1];
So you could call it from windows shell like:
#php script.php
usage: php script.php folderpath
#php script.php foldername
your folder is located at: foldername
And then the autocompletion feature will work.
Here's the code for my original PHP code:
public function outputText() {
$i = 1;
foreach($this->sorted_data as $this->data) {
echo "$i. ".$this->data[0]."<br/>";
$i++;
}
}
And here's the code for the PHPUnit:
public function testVerify() {
$yn = new SortThisData();
$yn->readFile("input.txt");
$output = $yn->outputText();
$this->assertTrue(is_string($output));
//if(!is_string($yn->get()))
// return false;
//$this->assertNotEmpty($yn->get());
}
The class is called SortThisData in the original PHP file.
When I used gettype(), it said it was null. I'm trying to verify that it is a string so it can pass in PHPUnit. Is there a way I can do this?
You're looking for assertInternalType().
Update: I didn't realize you were echoing the output. You will probably need to use output buffering to capture the text.
public function testVerify() {
$yn = new SortThisData();
$yn->readFile("input.txt");
// start output buffering and capture the output
ob_start();
$yn->outputText();
$output = ob_get_clean();
$this->assertInternalType('string', $output);
}
No disagreement with Baylor's answer. To answer the question, as asked, what you had was also good enough:
$this->assertTrue(is_string($output));
Or you could have done:
$this->assertEquals('string',gettype($output));
(The advantage of the latter is, when it fails, it will also tell you the type of $output; assertTrue will only tell you that something failed.)
assertInternalType() does exactly that, but was only introduced in PHPUnit 3.5, and you will still find PHPUnit 3.4 in use on some machines.
I've been using Codeigniter for the past two years and really have become a big fan, but over the past year I've found myself writing more and more javascript than PHP.
In the begining, I would write everything with PHP, but now I find myself using $.ajax all the time. And I sort of feel like Im repeating myself between javascript and php.
I know that CI does give you some good control over ajax, but Im still having two write a ton of javascript and I'd like to consolidate if at all possible.
I guess what I am looking for is a php framework that integrates tightly with jQuery's $.ajax.
I use this piece of code in Javascript. Backend wise things are organized in a MVC type of organisation, so things affecting one module are usually grouped together. In general I also create a sperate module for a seperate model, but in some cases you may deviate from this principle.
My setup is with symfony at the back and plain jquery at the front. There are some approaches that automatize this part, like http://javascriptmvc.com/, I find it too restricting in many parts. Here is my workflow for integrating php and jquery.
PHP
Execute a piece of code and wrap it inside a try/catch block. This way error messages may be propagated to the frontend. This method helps in that regard to convert exceptions to a readable error. (to debug from json).
try {
//... execute code .. go about your buisness..
$this->result = "Moved " . count($files) . " files ";
// result can be anything that can be serialized by json_encode()
} catch (Exception $e) {
$this->error = $e->getMessage() . ' l: ' . $e->getLine() . ' f:' . $e->getFile();
// return an error message if there is an exception. Also throw exceptions yourself to make your life easier.
}
// json response basically does something like echo json_encode(array("error" => $this->error, "result" => $this->result))
return $this->jsonResponse();
For error handling I often use this to parse errors.
public function parseException($e) {
$result = 'Exception: "';
$result .= $e->getMessage();
$trace = $e->getTrace();
foreach (range(0, 10) as $i) {
$result .= '" # ';
if (!isset($trace[$i])) {
break;
}
if (isset($trace[$i]['class'])) {
$result .= $trace[$i]['class'];
$result .= '->';
}
$result .= $trace[$i]['function'];
$result .= '(); ';
$result .= $e->getFile() . ':' . $e->getLine() . "\n\n";
}
return $result;
}
Javascript side
/**
* doRequest in an ajax development tool to quickly execute data posts.
* #requires jQuery.log
* #param action (string): url for the action to be called. in config.action the prefix for the url can be set
* #param data (object): data to be send. eg. {'id':5, 'attr':'value'}
* #param successCallback (function): callback function to be executed when response is success
* #param errorCallback (function): callback function to be executed when response is success
*/
jQuery.doRequest = function (action, data, successCallback, errorCallback) {
if (typeof(successCallback) == "undefined") {
successCallback = function(){};
}
if (typeof(errorCallback) == "undefined") {
errorCallback = function(data ){
alert(data.error);
};
}
jQuery.log(action);
jQuery.post(action, data, function (data, status)
{
jQuery.log(data);
jQuery.log(status);
if (data.error !== null || status != 'success') {
// error handler
errorCallback(data);
} else {
successCallback(data);
}
},'json');
};
Note: the error callbacks are very nice if you combine them with something like pNotify
Look into Agile Toolkit, which is a PHP UI Framework. UI means it takes care of HTML, JavaScript, CSS and AJAX while allowing you to develop in plain, object-oriented PHP language.
http://agiletoolkit.org/intro/javascript
There is also a blog post comparing it with CodeIgniter: http://agiletoolkit.org/blog/agile-toolkit-for-codeigniter-developer/
p.s. I'm co-author for Agile Toolkit.
if someone could help me to improve this function to use it with this format (from scratch, not tested):
<?php
define("LINEA", __LINE__, true);
function line($string)
{
return $string . LINEA;
}
echo line('Error: ');
?>
Example of current use:
<?php
function line($startText, $line, $endText = NULL)
{
$endText = !empty($endText) ? $endText : '';
return $startText . $line . $endText;
}
/*
...
lot of code
...
*/
echo line('Error on line: ', __LINE__) . '<br />';
/*
...
lot of code
...
*/
echo line('Alert - ', __LINE__, '!');
?>
Outputs:
Error on line: 12
Alert - 18!
You might consider using debug_backtrace to obtain information about the function caller, including line, file, class, the current scope, and much much more. This way you don't need to pass any of the line number information into your error logging function.
Be aware that generating this information can be somewhat of a drag on performance.
You should also consider using an existing logging package, like PEAR's Log, Zend_Log, or Apache log4php.
It doesn't look like your line() function is doing you any good any more. Why don't you just call:
echo 'Error on line: ' . __LINE__;