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

<html> 
<body> 
<?php 

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

Output:

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

<?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>"; 
} 

?>

main.php

<!DOCTYPE html> 
<html> 
<body> 
<?php 

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

Output:

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

Article Tags :

PHP

Web Technologies

PHP-function