Removes all kind of Arabic diacritical signs and markers and replaces them with their plain letter form. For the use of SearchWP Wordpress plugin.

searchwp_removearabic.php

<?php

/*
Plugin Name: SearchWP Remove Arabic Diacritics
Description: Removes all kind of إعراب-signs as well as تشكيل-signs for the use of SearchWP Wordpress plugin.
Author: Gerald Drissner
Note: This is a fork and extension of https://gist.github.com/BrElio/bd84d8035278adf834b29ec5e1187567 and Relevannsi's code snippet regarding foreign languages.
Version: 1.0.0
Last update: 2022-10-20
*/

add_filter( 'searchwp\tokens\string', 'swp_arabic_remap', 9 );

function swp_arabic_remap( $string ) {
	$remap = [
		'إ' => 'ا',
		'آ' => 'ا',
		'أ' => 'ا',
		'ئ' => 'ى',
		'ة' => 'ه',
		'ؤ' => 'و',
		'ـ' => '',
		'آ' => 'ا',

	];

	$diacritics = [
		'~[\x{0600}-\x{061F}]~u',
		'~[\x{063B}-\x{063F}]~u',
		'~[\x{064B}-\x{065E}]~u',
		'~[\x{066A}-\x{06FF}]~u',
	];

	$string = preg_replace( $diacritics, '', $string );
	$string = str_replace( array_keys( $remap ), array_values( $remap ), $string );

	return $string;
}

@BrElio ciao, grazie per lo script, sarebbe possibile contattarti per una consulenza?