stringToTitleCase.php

<?php
/*
 * Capitalize Input String to Title Case
 * Saved from on https://stackoverflow.com/a/44748446/4902224
 * "Converting String to Title Case - PHP" 2017-06-25
*/
function makeTitleCase($input) {
     $smallwordsarray = array('of','a','the','and','an','or','nor','but','is','if','then','else','when', 'at','from','by','on','off','for','in','to','into','with','it', 'as' );
     
     //Split input string into an array of words
     $words = explode(' ', $input);
     foreach ($words as $key => $word) {
        // If this word is the first or it's not a "small word", capitalise it.
        if ($key == 0 or !in_array(strip_tags($word), $smallwordsarray)) {
             $old = strip_tags($word);
             $new = ucfirst($old);
             $words[$key] = str_replace($old,$new,$word);
        }
     }
     //Put the array of words back into a string
     $capitalizedItemName = implode(' ', $words);
     return $capitalizedItemName;
}

$title = ['lord of the rings', 'of mice and men', 'in the way', 'mother of pearl', 'wind in the willows', 'organic bananas', 'cream of wheat'];

foreach ($titles as $title) {
    echo makeTitleCase($title) . "\n";
}
?>