PHP mb_http_output() Function

The mb_http_output() function is an inbuilt function in PHP that is used to set and retrieve the character encoding. This function allows you to specify a character encoding for HTTP response.

Syntax:

mb_http_output($encoding )

Parameters: This function accepts only one parameter which is described below.

• $encoding: This is the optional parameter that specifies the character encoding.

Return Value: This function returns the boolean value if the function successfully executes, it will return “true” otherwise it will return false. If the $encoding removes the function, it will be used by default encoding.

Program 1: The following program demonstrates the mb_http_output() function.

PHP

<?php

// Get the current HTTP output character encoding
$encoding = mb_http_output();

echo "Current HTTP output encoding: " . $encoding;

?>

Output

Current HTTP output encoding: UTF-8

Program 2: The following program demonstrates the mb_http_output() function.

PHP

<?php

$encoding = "UTF-8";
$condition = true;

function custom_mb_http_output($encoding, $condition) {

    // Validate the encoding parameter
    if (!in_array($encoding, mb_list_encodings())) {
        return false; // Invalid encoding
    }

    // Conditionally set the character encoding
    // based on a condition
    if ($condition) {
        mb_http_output($encoding);
        return true; // Encoding set successfully
    } else {
        return false; // Encoding not set
    }
}

if (custom_mb_http_output($encoding, $condition)) {
    echo "Character encoding set to $encoding for HTTP output.";
} else {
    echo "Failed to set character encoding for HTTP output.";
}

?>

Output:

Character encoding set to UTF-8 for HTTP output. 

Reference: https://www.php.net/manual/en/function.mb-http-output.php