PHP mb_encode_numericentity() Function

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The mb_encode_numericentity() function is an inbuilt function in PHP that is used to convert characters in a given string to their corresponding HTML numeric entity representations.

Syntax

mb_encode_numericentity(
    string $string,
    array $map,
    ?string $encoding = null,
    bool $hex = false
): string

Parameters

This function accepts four parameters that are described below.

$string: This parameter specifies the string that is to be decoded.
$map: The code area that is to be transformed, is represented by the map, which is an array.
hex: This parameter denotes either the entity reference will be hexadecimal notation or decimal notation.
$encoding: The encoding parameter denotes the character encoding. If omitted or null, then the internal character encoding value will be used.

Return Value

The mb_encode_numericentity() function returns the encoded string if the function successfully executes otherwise. It will return false.

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

PHP

<?php 
  
$input_string = "Bonjour tout le monde! Ça va bien ?"; 
  
// Check if the input string contains french characters 
if (preg_match("/[\x{00C0}-\x{02AF}]/u", $input_string)) { 
    $convmap = [0x80, 0x10ffff, 0, 0x7fffffff]; 
    
    // Encode characters from decimal 
   // (hexadecimal 0x80 to 0x10FFFF) 
    $encoded_string = mb_encode_numericentity( 
        $input_string, 
        $convmap, 
        "UTF-8", 
        true 
    ); 
} else { 
    $encoded_string = $input_string; 
} 
echo $encoded_string; 
?>

Output

Bonjour tout le monde! Ça va bien ?

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

PHP

<?php 
$input_string = "Hello, こんにちは!"; 
  
// Encode characters from decimal 128 to 65535 
$convmap = [0x80, 0xffff, 0, 0xffff]; 
$encoded_string =  
      mb_encode_numericentity($input_string, $convmap, "UTF-8"); 
echo $encoded_string; 
?>

Output:

Hello, こんにちは!

Reference: https://www.php.net/manual/en/function.mb-encode-numericentity.php

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