PHP | show_source() Function

The show_source() function is an inbuilt function in PHP which is used to return a file with the PHP syntax highlighted. The syntax is highlighted by using HTML tags.

Syntax:

show_source( $filename, $return )

Parameters: This function accepts two parameters as mentioned above and described below:



  • $filename: It is required parameter. It specifies the file whose content to be display.
  • $return: It is optional boolean parameter. Its default value is FALSE. If it is set to TRUE, instead of printing it out, this function will return the highlighted code as a string.

Return Value: If it is set to TRUE then it returns the highlighted code as string. It will return TRUE on success or return FALSE on failure.

Note:

  • This function is available for PHP 4.0.0 and newer version.
  • The color used for highlighting the PHP syntax can be set with the ini_set() function or in the php.ini file.
  • With this function entire file will be displayed, that may include sensitive data like passwords etc.

Below programs illustrate the show_source() function in PHP:

Program 1: Below program save the file using file name show_source.php

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<html>
<body>
<?php
show_source("show_source.php");
?>
</body>
</html>

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Output:
image

Program 2: Below program save the file using file name source_code.php

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<?php
  
// Loading XML document to $user
$user = <<<XML
<user>
    <username>Geeks123</username>
    <name>GeeksforGeeks</name>
    <phone>+91-XXXXXXXXXX</phone>
    <detail font-color="blue" font-size="24px">
        Noida, India
    </detail>
</user>
XML;
  
// Loading string as simple xml object
  
$xml = simplexml_load_string($user);
  
// Printing children element
foreach($xml->children() as $child) {
    echo "child node:" . $child . "</br>";
}
  
?>

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main.php

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<!DOCTYPE html>
<html>
<body>
<?php
show_source("source_code.php");
?>
</body>
</html>

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Output:

Reference: https://www.php.net/manual/en/function.show-source.php



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