How to output source code in php without interpreting it

As an imperative scripting language, PHP's main function is to interpret the read source code into executable code and output the results. But sometimes we need to output the source code directly without letting PHP interpret it. So how to achieve it?

Method 1: Use highlight_file function

PHP provides a function highlight_file(), which can highlight the specified file code and output it without interpretation. The specific usage is as follows:

<?php
highlight_file(&#39;test.php&#39;);
?>

This code will highlight the code of the test.php file and will not explain it. However, it should be noted that this function can only output the source code of the file, not the source code of functions or variables.

Method 2: Use the highlight_string function

In addition to outputting the code of the file, we can also use the highlight_string() function to output the code of a string, and it can also be used without explain. The specific usage is as follows:

<?php
$code = "<?php echo &#39;Hello world!&#39;; ?>";
highlight_string($code);
?>

This code will highlight the code of the $code string and will not interpret it. It should be noted that this function will escape the special characters in $code. If you want to output the original string, you can use PHP's stripslashes() function.

Method 3: Use the file_get_contents function

In addition to the above two methods, you can also use the file_get_contents() function provided by PHP to read the source code of the file, and then usehtmlspecialchars()The function encodes the code into HTML entities and finally outputs it to the page. The specific usage is as follows:

<?php
$code = file_get_contents(&#39;test.php&#39;);
echo &#39;<pre class="brush:php;toolbar:false">' . htmlspecialchars($code) . '

This code will read the source code of the test.php file, encode it into HTML entities and output it to the page. Compared with the first two methods, this method can output the source code of any string. However, it should be noted that this method cannot perform code highlighting.

In general, the above three methods can achieve the effect of PHP output source code without interpretation. In practical applications, different methods can be selected according to specific needs.

The above is the detailed content of How to output source code in php without interpreting it. For more information, please follow other related articles on the PHP Chinese website!