- mb_strpos: documentation ( source)
- mb_detect_encoding: documentation ( source)
- mb_strlen: documentation ( source)
- print_r: documentation ( source)
<?php
$s="ó12345678\r\n1234\n;";
//$s=utf8_encode("ó12345678\r\n1234\n;")
// "ó12345678rn1234n;"
// 012345678901234567890
print_r(mb_detect_encoding($s)."\n");
print_r(mb_strlen($s,'UTF-8')."\n");
print_r(mb_strpos($s,';',0,'UTF-8')."\n");