PHP ob_get_clean() Function

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The ob_get_clean() function is an in-built PHP function that is used to clean or delete the current output buffer. It’s also used to get the output buffering again after cleaning the buffer. The ob_get_clean() function is the combination of both ob_get_contents() and ob_end_clean().

Syntax:

string|false ob_get_clean();

Parameters: It does not accept any parameter.

Return value: This function returns the contents of the output buffer and end output buffering. If output buffering is not active, then it returns false.

Example 1: Below is a simple example of ob_get_clean() functionality.

PHP

<?php 
  
 // Create an output buffer 
ob_start(); 
  
echo "Welcome to zambiatek"; 
  
$out = ob_get_clean(); 
$out = strtolower($out); 
  
var_dump($out); 
?>

Output:

string(24) "Welcome to zambiatek"

Example 2:

PHP

<?php 
  
// Declare a class  
class GFG { 
    public function GFG_Funcion() { 
        $variable = array( 
            "A" => "Welcome", 
            "B" => "zambiatek", 
            "C" => "Geeks"
        ); 
  
        foreach ($variable as $key => $value) { 
            echo $key . " => " . $value; 
            echo "<br/>"; 
        } 
    } 
} 
  
ob_start(); 
  
// Creating an object of class GFG 
$object = new GFG(); 
  
// Calling function 
$object -> GFG_Funcion(); 
  
$saved_ob_level = ob_get_level(); 
  
$start_ob_level=""; 
  
while (ob_get_level() > $start_ob_level) { 
    ob_end_flush(); 
} 
  
// Now, it is the final output buffer 
$content = ob_get_clean(); 
  
?> 