Is it possible for PHP file to print itself, for example <?php some code; ?> that I get output in HTML as <?php some code; ?>(I know its possible in c++), if not is it possible to actually print html version of php code with nice formatting and colors such as from this url inside code container http://woork.blogspot.com/2009/07/twitter-api-how-to-create-stream-of.html. OR from this website when you press code, while posting your example your code gets wrapped or whatever term is for that, makes it distinguishable from other non-code text. tnx
Yes.
<?php readfile(__FILE__)
__FILE__ is a magic constant that contains the absolute filesystem path to the file it is used in. And readfile just reads and prints the contents. And if you want to have a syntax highlighted HTML output, try the highlight_file function or highlight_string function instead.
I'm not sure if this is exactly what you want but you can print a file using:
echo file_get_contents(__FILE__);
or syntax-highlighted:
highlight_file(__FILE__);
Related
I have php editor.The php code in the editor go to this php variable: $redux_demo['opt-ace-editor-php']. How can I write this variable to php file?
For example, I insert the css code come from css editor like this:
echo '<style type="text/css">'.$redux_demo['opt-ace-editor-css'].'</style>';
Also, <?php tag may can be use top of code in editor or may not.So, the code must work in two scenerio.
So, I wonder can I use <?php tag after another? Or can I use <?php tag in echo function?
PHP code is different from those code running inside the browser. PHP code runs in your server.
If you are sure you want to write code into PHP file. Try use:
file_put_contents("path/to/php/file.php",$content);
And make sure, for every PHP file, a tag should be put at the beginning, like:
file_put_contents("path/to/php/file.php","<?php\n$content");
BTW, be alert and careful when write PHP file dynamically, it may introduce security issue by doing this.
I have some large HTML code that I want to put in a PHP variable without losing the syntax highlight. I would also like for when it is put in as a variable, it will be shown as a normal string not HTML code.
Is there a way like:
<?php
$var =
?>
HTML GOES HERE
<?php
;
echo $var;
?>
I know my code here doesn't make sense, but it's just to describe the situation.
If the code is very long - say a menu div or something, you can use include. It won't give you a variable to use, but the result is the same.
<?php
include file_with_my_code.php;
?>
In file_with_my_code.php (doesn't have to be .php, .html works just fine as well) you simply paste the code as if you were creating a standalone html file.
Just found it!
$var = <<<HTML
<HTML GOES HERE>
HTML;
If I have a piece of code that reads a chunk of HTML from a txt file and then echos that html onto the page, how can I accomplish the same task, but when there is PHP inside of the txt file?
ex:
this is the file being read:
<?php
$filecontent = // read some other file
echo($filecontent);
?>
and this is the page that is reading the file:
<?php
$code1 = //reading the above file
?>
<html>
<?php echo($code1); ?>
</html>
When you want to process files containing PHP code you need to use include instead of echo.
<?php include('your_php_file_name'); ?>
If you have the contents of the file in a string you are in a tough spot because the only way to process the code is eval, and in addition you have to properly set up any environment that the code requires. eval itself should be avoided, and the latter is impossible to do in the general case.
Use include instead of echo:
<?php include($file_that_contains_php); ?>
you need to include the first file and echo statement in the first file will get executed.
<html>
<?php require_once("firstfile.php"); ?>
You need to echo htmlentities($code1), because when you echo then browser will not show it contents, because it try to parse it as a html tag, but htmlentities will encode to safe html output this characters.
If you want to evaulate the code, then you need eval($code1) or include it.
I'm attempting to make a template file for a CMS that I'm making where the template file can contain variables like {username} as regular text that get replaced when the page gets included on the index.php page.
Example:
Index Page:
<?php include('templates/123/index.php'); ?>
templates/123/index.php page
<?php include('header.php'); ?>
Welcome {username}
<?php include('footer.php'); ?>
I've tried several methods; however, always run into problems because the page I'm trying to change the content on includes PHP code. Every method I try either 1) messes up because the opening and closing of PHP tags within the document OR 2) just echoes out the PHP code in the document. Is there any way that I can still achieve this? Maybe even with a class of some kind? I just want to be able to achieve this safely.
I will also be using this to where custom variables like {content1} get replaces with a php code that will be ioncubed that retrieves the data from database for content located in column1, same with {column2} {column3} and {column4}. I'm just trying to make the creation of templates extremely easy. (so I'd like to make the code work for that as well)
My preferred method of doing stuff like this involves starting my code with:
ob_start(function($c) {
$replacements = array(
"username"=>"Kolink",
"rank"=>"Awesome"
);
return preg_replace_callback("/{(\w+)}/",function($m) use ($replacements) {
return isset($replacements[$m[1]]) ? $replacements[$m[1]] : $m[0];
},$c);
});
Two steps I suggest
Load the result of your file "templates/123/index.php" into a variable. see this link for how to do it assign output of execution of PHP script to a variable?
use strtr() function to replace your placeholder i.e {username} with actual values
I think this will server your needs.
How would one go about showing PHP code on user end. Sort of like w3School does?
Having lets say a grey area div, and then showing the code in there without activating it?
You can use html entities <?php in the html it will be rendered as <?php
You can use htmlspecialchars to encode your code to use html entities.
Use <pre> or <code> tags to wrap your code.
Take a look at http://php.net/manual/en/function.highlight-string.php to further see how you can make the code look pretty.
Since passing a large block of code to highlight_string() can be messy, you may want to look at output buffering in combination with highlight_string to output colorized php code.
Something like:
<?php
ob_start();
?>
phpinfo();
echo "this echo statement isn't executed";
<?php
$code = ob_get_clean();
highlight_string($code);
?>
Simply you can use following code to display php code on webpage.
highlight_string("<?php print('This is php code.'); ?>");
It will give output like
<?php print('This is php code.'); ?>
The first step is to not wrap that code in PHP tags. So instead of this:
<?
var sample = "code";
?>
You would have this:
var sample = "code";
It's not the code itself which triggers the server-side compile from the PHP engine, it's the tags which indicate to that engine what blocks of the file are code and what are not. Anything that's not code is essentially treated as a string and output to the page as-is for the browser to interpret.
Once you're outputting the code, it's then a matter of formatting it. The old standard is to wrap it in pre tags to get rid of HTML-ish formatting:
<pre>
var sample = "code";
</pre>
You can also apply CSS style to the pre tags (or any other tags you want to use for displaying code, such as div) as you see fit.
There are also very useful code syntax highlighting plugins and tools to make the code a lot "prettier". Google-code-prettify often comes highly recommended.
Typically this is done by showing code within <pre> or <code> tags.
You can use this template........
######################################################################
echo "<h2><br>Source Code of ".basename((string)__FILE__) . "</h2><hr>";
show_source(__FILE__);
echo "<hr>";
echo "<h2>Output of ".basename((string)__FILE__) . "<hr></h2>";
#######################################################################
It will show the source code and output following.
use the header function of php, this will rea
<?php
header("content-type: text/plain");
?>
The PHP code will just be a string that you can echo or print onto the page, no different than any other data you want PHP to display for you. If you want to keep the formatting (ex. the indentation), put it inside a <pre><code> block.
Ex:
$php_code = '<?php $foo = bar; ?>';
echo "<pre><code>$php_code</code></pre>";