<?php
 
	function porcentagem_maiusculas( $string ) {
		$count = 0;
		$len = mb_strlen( $string );
 
		for( $i = $len - 1; $i >=0 ; --$i ) {
			$char = mb_substr( $string, $i, 1 );
			$count += ( mb_strtolower( $char ) == $char ? 0 : 1 );
		}
		return 100 * $count / $len;
	}
 
    echo  porcentagem_maiusculas( 'TÍTULO EM MAIÚSCULAS?') .PHP_EOL;
	echo  porcentagem_maiusculas( 'título em maiúsculas?') .PHP_EOL;
	echo  porcentagem_maiusculas( 'Título em Maiúsculas?') .PHP_EOL;
	echo  porcentagem_maiusculas( 'TITULO em MAIUSCULAS?') .PHP_EOL;
 
 

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