PHP mb_detect_encoding() Function

The mb_detect_encoding() is an inbuilt function in PHP that is used to detect the encoding of the string. 

Syntax:

string|false mb_detect_encoding(
    string $string, 
    array|string|null $encodings = null, 
    bool $strict = false
)

Parameters: This function accepts three parameters that are described below.

• $string: The string for which the encoding needs to be detected.
• $encoding:  A comma-separated list of encodings to be checked. If not specified, a list of popular encodings is used.
• $strict:  A boolean value indicating whether to use strict detection or not. If set to “true”, only encodings that are super-sets of the input string’s encoding are returned.

Return Values: This function returns detecting encoding of the input string, if no encoded is detected, it will return “false”.

Example 1: The following program demonstrates the mb_detect_encoding() function.

PHP

<?php
$string = "Hello world!";
$encoding = mb_detect_encoding($string);
echo "The string '$string' is encoded in '$encoding'.";
?>

Output:

The string 'Hello world!' is encoded in 'ASCII'.  

Example 2: The following program demonstrates the mb_detect_encoding() function.

PHP

<?php
$string = "This is an English sentence.";
$encoding = mb_detect_encoding($string);
if ($encoding === 'UTF-8') {
    echo "The string '$string' is encoded in UTF-8.";
} else {
    echo "The string '$string' is not encoded in UTF-8.";
}
?>

Output:

The string 'This is an English sentence.' is not encoded in UTF-8.   

Reference: https://www.php.net/manual/en/function.mb-detect-encoding.php