How can variables be passed with readfile in PHP?

When using the readfile function in PHP to output the contents of a file, you cannot directly pass variables to it. However, you can use output buffering to capture the contents of the file into a variable and then manipulate it before outputting it. This allows you to include variables in the file content before sending it to the browser. 

<?php
// Set the filename
$filename = 'example.txt';

// Start output buffering
ob_start();

// Read the contents of the file into the output buffer
readfile($filename);

// Get the contents of the output buffer
$fileContents = ob_get_clean();

// Manipulate the file contents as needed, e.g. replacing placeholders with variables
$variable = 'Hello World';
$fileContents = str_replace('{placeholder}', $variable, $fileContents);

// Output the modified file contents
echo $fileContents;
?>

Keywords

PHP readfile variables passing functions

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