PHP function to remove accents from Greek text

remove_greek_accents.php

<?php 
/*
 * Run it like so: 
 *
 * $text = 'Your text';
 * echo remove_greek_accents( $text );
 */

function remove_greek_accents( $string )
	{
		$text = [
			'Ά' => 'Α',
			'Έ' => 'Ε',
			'Ή' => 'Η',
			'Ί' => 'Ι',
			'Ό' => 'Ο',
			'Ύ' => 'Υ',
			'Ώ' => 'Ω',
			'ά' => 'α',
			'έ' => 'ε',
			'ή' => 'η',
			'ί' => 'ι',
			'ό' => 'ο',
			'ύ' => 'υ',
			'ώ' => 'ω',
			'ΰ' => 'ϋ',
			'ΐ' => 'ϊ',
			'ΆΙ' => 'ΑΪ',
			'ΆΥ' => 'ΑΫ',
			'ΈΙ' => 'ΕΪ',
			'ΌΙ' => 'ΟΪ',
			'ΈΥ' => 'ΕΫ',
			'ΌΥ' => 'ΟΫ',
			'άι' => 'αϊ',
			'έι' => 'εϊ',
			'Άυ' => 'αϋ',
			'άυ' => 'αϋ',
			'όι' => 'οϊ',
			'Έυ' => 'εϋ',
			'έυ' => 'εϋ',
			'όυ' => 'οϋ',
			'Όυ' => 'οϋ',
		];

		foreach ( $text as $key => $value )
		{
			if ( $key )
			{
				$string = str_replace( $key, $value, $string );
			}
		}

		return $string;
	}
?>