I am currently using this command to validate some PHP files.
$op=null; $ret=null; exec("php -l '$file' 2>&1",$op,$ret);
Unfortunately on the customer's shared hosting (linux) it fails with the line below obviously because some commands are disabled:
Warning: exec(): Unable to fork [php -l '/path_to_the_file.php' 2>&1] in /my_program.php on line 559
I want to avoid this Warning at all costs because as soon as I disable debugging, the host shows its 500 error page which completely kills the webpage (for some strange reason).
Try/Catch does not work at all.
try {
$op=null; $ret=null; exec("php -l '$file' 2>&1",$op,$ret);
if($ret != 0) {
throw new Exception("'$file' failed syntax check");
}
} catch(Exception $e) {
$this->addLog(LOG_ERR, 'syntax error', $e);
continue;
}
Any ideas how to avoid this Warning?
This is the only solution that worked for me.
I used a couple of functions to check if exec is available and enabled:
private function commandEnabled($comm) {
return is_callable($comm) && !($this->commandDisabled($comm));
}
private function commandDisabled($comm) {
return !(false === stripos(','.ini_get('disable_functions').',', ','.$comm.','));
}
if (!$this->commandEnabled('exec')) {
// I run my code here
}
UPDATE:
I just found out from this post https://stackoverflow.com/a/29268475/1806085
that you can also catch the error in PHP 7+ with this:
try {
some_undefined_function_or_method();
} catch (\Error $ex) { // Error is the base class for all internal PHP error exceptions.
var_dump($ex);
}
Related
I want to receive the error message in php before it gets executed. Basicly what i mean is that if I would have a bad code:
// This code is incorrect, I want to receive the error before it gets handled!
$some_var = new this_class_is_not_made;
Now that class does not exist, so it would be handles by the default error handler in php. But I want to disable the normal error handler and create my own.
Another example:
somefunction( string some_var ); // some_var misses the variable prefix. ( $ )
Example error message:
Fatal error: function 'some_var' is not defined in line: $x!
And this error would be: somefunction( string some_var );
But how would I receive the messages but also disable the normal error system?
EDIT: Making the error system execute a user-defined function
// I would want the error system to execute a function like this:
function(string $errorMessage, int $error_code){
if($error_code < 253){ return "Fatal error"; }
if($error_code < 528 && $error_code > 253){ return "Warning"; }
}
Answer found: By: ShiraNai7
try
{
// Code that may throw an Exception or Error.
}
catch (Throwable $t)
{
// Executed only in PHP 7, will not match in PHP 5
}
catch (Exception $e)
{
// Executed only in PHP 5, will not be reached in PHP 7
}
In PHP 7.0.0 or newer the code will throw Error exception if this_class_is_not_made doesn't exist.
try {
$some_var = new this_class_is_not_made;
} catch (Error $e) {
echo $e->getMessage();
}
Note that that this will also catch any other Error exceptions in case this_class_is_not_made does exist and causes some other error along the way.
In PHP versions prior to 7.0.0 you're out of luck - fatal errors always terminate the main script.
It might be a better idea to use class_exists() instead:
if (class_exists('this_class_is_not_made')) {
$some_var = new this_class_is_not_made;
}
This works in all PHP versions that support classes.
So I have the following code:
try {
if ($connectionid = ldap_connect($ldapserver)) {
$ldapbindid=ldap_bind($connectionid, $binddn, $bindpw);
if ($mysearch = ldap_search($connectionid, $basedn, $query)) {
//more LDAP code here
}
} else {
return false;
}
} catch (Exception $exception) {
return false;
}
But because I'm supplying the wrong binddn and password, I'm getting a PHP error in the ldap_bind command.
Warning: ldap_bind(): Unable to bind to server: Invalid credentials
But reading my code, I understand I should get a boolean instead?
I have the impression that any errors that happens within the confines of the "try" section is going to be handled by the "catch" section. perhaps I'm understanding try/catch incorrectly?
Thanks a lot
i am trying to download a zip file from server and save it. i get the following error.
the project is in cakePHP
Downloading /server/biruhxml20140925.zip ...
Warning Error: ftp_get(): Transfer complete. in [(pathprefix)/app/Console/Command/Task/ImportUtilityTask.php, line 214]
//server/biruhxml20140925.zip could not be downloaded to (pathprefix)/files/downloaded_files/bild/biruhxml20140925.zip
biruhxml20140925.zip could not be downloaded as the file is not there yet.
this is the function which makes the call.
public function downloadFTPFile ($remoteFile, $localFile) {
$connection = $this->ftpConnection;
ftp_pasv($this->ftpConnection, true);
$this->out(__('Downloading %s ... ', $remoteFile));
try {
if (ftp_get($connection, $localFile, $remoteFile, FTP_BINARY)) {
$this->out(__('Saved %s', $localFile));
return true;
} else {
$this->out(__('%s could not be downloaded to %s', $remoteFile, $localFile));
return false;
}
} catch (Exception $e) {
#unlink($localFile);
$this->out($e->getMessage());
}
$this->nl();
return false;
}
can anyone suggest a work around to get rid of the warning other then setting debug level 0 in core.php
Have you considered, based on the error message, that the file you try to download is not present on the server?
Your code doesn't do a check if the file is there, I would add that and handle that case accordingly.
If I include a file in to php. If there is any fatal error in that php then is there any way to skip that .
<?php
include "somefile.php";
echo "OK"; // Is there any way to print this OK If there is any fatal error on somefile.php
?>
I need to include this somefile.php file. It may return fatal error
for some host. I want to skip this file for those host.
Please Advice me.
With this, you can define your own continuation function that will take over in case of a fatal error. This uses register_shutdown_function() to intercept the fatal error.
Usage:
function my_continuation_func($filename, $arg2) {
// On fatal error during include, continue script execution from here.
// When this function ends, or if another fatal error occurs,
// the execution will stop.
}
include_try('my_continuation_func', array($filename, $arg2));
$data = include($filename);
$error = include_catch();
If a fatal error occurs (like a parse error), script execution will continue from my_continuation_func(). Otherwise, include_catch() returns true if there was an error during parsing.
Any output (like echo 'something';) from the include() is treated as an error. Unless you enabled output by passing true as the third argument to include_try().
This code automatically takes care of possible working directory changes in the shutdown function.
You can use this for any number of includes, but the second fatal error that occurs cannot be intercepted: the execution will stop.
Functions to be included:
function include_try($cont_func, $cont_param_arr, $output = false) {
// Setup shutdown function:
static $run = 0;
if($run++ === 0) register_shutdown_function('include_shutdown_handler');
// If output is not allowed, capture it:
if(!$output) ob_start();
// Reset error_get_last():
#user_error('error_get_last mark');
// Enable shutdown handler and store parameters:
$params = array($cont_func, $cont_param_arr, $output, getcwd())
$GLOBALS['_include_shutdown_handler'] = $params;
}
function include_catch() {
$error_get_last = error_get_last();
$output = $GLOBALS['_include_shutdown_handler'][2];
// Disable shutdown handler:
$GLOBALS['_include_shutdown_handler'] = NULL;
// Check unauthorized outputs or if an error occured:
return ($output ? false : ob_get_clean() !== '')
|| $error_get_last['message'] !== 'error_get_last mark';
}
function include_shutdown_handler() {
$func = $GLOBALS['_include_shutdown_handler'];
if($func !== NULL) {
// Cleanup:
include_catch();
// Fix potentially wrong working directory:
chdir($func[3]);
// Call continuation function:
call_user_func_array($func[0], $func[1]);
}
}
Fatal means fatal ...
There is no way to recover from a fatal error.
You can use register_shutdown_function.
<?php
function echoOk()
{
echo "OK";
}
register_shutdown_function(function ()
{
$error = error_get_last();
// to make sure that there is any fatal error
if (isset($error) &&
($error['type'] == E_ERROR
|| $error['type'] == E_PARSE
|| $error['type'] == E_COMPILE_ERROR
|| $error['type'] == E_CORE_ERROR))
{
echoOk();
}
});
include "somefile.php";
echoOk();
But you can do it only once. Any further fatal error will stop execution.
PHP won't tolerate with Fatal Errors. Best to check the included file and solve it.
Actually, you can try looking at register-shutdown-function, but it's not recommended to run away from your problems.
Yes, there is. It can be done through a simple if statement
You Have:
<?php
include "somefile.php";
echo "OK"; // Is there any way to print this OK If there is any fatal error on
?>
Try This:
<?php
if(include "somefile.php"){
// echo do something if success
}else{
echo "OK";
}
edit: I missed the word fatal. As stated, you can't recover from a fatal error. If it is just an exception the hastly writen response below will work.
Including another php module is the same as that code being inserted inline, so a simple try-catch statement should work:
<?php
try {
include "somefile.php";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
}
echo "OK";
?>
Try to set a set_error_handler() function that doesn't die on fatal errors, but instead Apache crashed. In other words, PHP needs to die so that the system doesn't.
See this LINK
Fatal Error means there is something seriously wrong with the including code. As #Orangepill said there is no way to stop this fatal error message popping up. Please go through your coding and find the error.
I have a class and the commented line is failing (clearly because I don't need the $ before displayname), however I ended up having to put a bunch of echo statements in to figure that out because an error isn't being thrown.
I'm hoping there is a way.
class RegisterModel {
var $displayname;
...
function RegisterModel() {
try {
if (empty($_POST) === false) {
// THIS LINE IS FAILING ... BUT I'M NOT GETTING AN ERROR
// I KNOW WHY IT'S FAILING ... BUT I WANT AN ERROR TO THROW
$this->$displayname = $_POST['displayname'];
...
}
}
catch (Exception $e) {
echo $e->getMessage();
}
}
}
Should the error be getting thrown into the catch and I'm just not using it right? Is there some global setting I need to set so that the errors are thrown?
set_error_handler(function($errno ,$errstr,$errfile,$errline,$errcontext){
if($errno & error_reporting()) throw new Exception($errstr,$errno);
});
Keep in mind you want to set error_reporting to your desired level.
You can try adding:
error_reporting(E_ALL);
ini_set('display_errors', 1);
If this displays the error, you have a potential run-time configuration error. You could adjust your configuration accordingly if it's impossible. You can look at the various error-related variables defined here.