How to Efficiently Remove Emoji Characters from Instagram Comments in PHP?

PHP: Writing a Simple removeEmoji Function

Question:

How can I create a simple function to remove Emoji characters from Instagram comments using PHP?

Proposed Implementation:

<code class="php">public static function removeEmoji($string)
{
    // split the string into UTF8 char array
    // for loop inside char array
        // if char is emoji, remove it
    // endfor
    // return newstring
}</code>

Recommended Solution:

While the proposed implementation leverages a loop to identify and remove emojis, a more efficient solution exists using the preg_replace function.

<code class="php">public static function removeEmoji($text) {

    $clean_text = "";

    // Match Emoticons
    $regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';
    $clean_text = preg_replace($regexEmoticons, '', $text);
    
    // Match Miscellaneous Symbols and Pictographs
    $regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';
    $clean_text = preg_replace($regexSymbols, '', $clean_text);

    // Match Transport And Map Symbols
    $regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';
    $clean_text = preg_replace($regexTransport, '', $clean_text);

    // Match Miscellaneous Symbols
    $regexMisc = '/[\x{2600}-\x{26FF}]/u';
    $clean_text = preg_replace($regexMisc, '', $clean_text);

    // Match Dingbats
    $regexDingbats = '/[\x{2700}-\x{27BF}]/u';
    $clean_text = preg_replace($regexDingbats, '', $clean_text);

    return $clean_text;
}</code>

This function targets specific Unicode ranges to identify and remove emojis from the input text. Refer to the unicode.org - full emoji list for additional emoji character ranges.

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