<?php
 
	$palavra = "àñáçâçí"; // 7 letras
 
	function tirarAcentos($string){
	    return preg_replace(array("/(á|à|ã|â|ä)/","/(Á|À|Ã|Â|Ä)/","/(é|è|ê|ë)/","/(É|È|Ê|Ë)/","/(í|ì|î|ï)/","/(Í|Ì|Î|Ï)/","/(ó|ò|õ|ô|ö)/","/(Ó|Ò|Õ|Ô|Ö)/","/(ú|ù|û|ü)/","/(Ú|Ù|Û|Ü)/","/(ñ)/","/(Ñ)/","/(ç)/","/(Ç)/"),explode(" ","a A e E i I o O u U n N c C"),$string);
	}
 
	$sem = tirarAcentos($palavra);
 
	$i = 0;
	while(!empty($sem[$i])){
	  $i++;
	}
	echo $i;

PD9waHAKCgkkcGFsYXZyYSA9ICLDoMOxw6HDp8Oiw6fDrSI7IC8vIDcgbGV0cmFzCgkKCWZ1bmN0aW9uIHRpcmFyQWNlbnRvcygkc3RyaW5nKXsKCSAgICByZXR1cm4gcHJlZ19yZXBsYWNlKGFycmF5KCIvKMOhfMOgfMOjfMOifMOkKS8iLCIvKMOBfMOAfMODfMOCfMOEKS8iLCIvKMOpfMOofMOqfMOrKS8iLCIvKMOJfMOIfMOKfMOLKS8iLCIvKMOtfMOsfMOufMOvKS8iLCIvKMONfMOMfMOOfMOPKS8iLCIvKMOzfMOyfMO1fMO0fMO2KS8iLCIvKMOTfMOSfMOVfMOUfMOWKS8iLCIvKMO6fMO5fMO7fMO8KS8iLCIvKMOafMOZfMObfMOcKS8iLCIvKMOxKS8iLCIvKMORKS8iLCIvKMOnKS8iLCIvKMOHKS8iKSxleHBsb2RlKCIgIiwiYSBBIGUgRSBpIEkgbyBPIHUgVSBuIE4gYyBDIiksJHN0cmluZyk7Cgl9CgkJCQkJCQkJCQkKCSRzZW0gPSB0aXJhckFjZW50b3MoJHBhbGF2cmEpOwoJCgkkaSA9IDA7Cgl3aGlsZSghZW1wdHkoJHNlbVskaV0pKXsKCSAgJGkrKzsKCX0KCWVjaG8gJGk7