php hebrew reverse

functions.php

<?php
function reverseHebrew( $text ) {
	$words = array_reverse( explode( ' ', $text ) );
	foreach ( $words as $index => $word ) {
		if ( isHebrew( $word ) ) {
			$words[ $index ] = mbStrRev( $word );
		}
	}

	return join( ' ', $words );
}

function isHebrew( $text ) {
	for ( $i = 0, $cnt = strlen( $text ); $i < $cnt; ++ $i ) {
		if ( ord( $text[ $i ] ) > 127 ) {
			return true;
		}
	}

	return false;
}

function mbStrRev( $string, $encoding = null ) {
	if ( $encoding === null ) {
		$encoding = mb_detect_encoding( $string );
	}

	$length   = mb_strlen( $string, $encoding );
	$reversed = '';
	while ( $length -- > 0 ) {
		$reversed .= mb_substr( $string, $length, 1, $encoding );
	}

	return $reversed;
}

echo reverseHebrew('')