Question

Is there a built-in php function, or a simple (efficient!) way to combine built-in functions, to give a string sentence case (“Sentence one. Sentence two.”)?

PHP has similar built-in functions, but none that I can find for my it to my purposes:

ucfirst(strtolower("SENTENCE ONE. AND HERE'S TWO.")) returns “Sentence one. and here’s two.”; ucwords(strtolower("SENTENCE ONE. AND HERE'S TWO.")) “Sentence One. And Here’s Two.”

Answer 1

function sentence_case($str) {
   $cap = true;
   $ret='';
   for($x = 0; $x < strlen($str); $x++){
       $letter = substr($str, $x, 1);
       if($letter == "." || $letter == "!" || $letter == "?"){
           $cap = true;
       }elseif($letter != " " && $cap == true){
           $letter = strtoupper($letter);
           $cap = false;
       } 
       $ret .= $letter;
   }
   return $ret;
}

This will preserve existing proper noun capitals, acronyms and abbreviations.