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@ 2014-08-19T15:05:22Z

<?php

echo preg_replace_callback('(\b[a-z])', function($match) {
    return strtoupper($match[0]);
}, 'a colour-with random crap in it');

Output
Performance
VLD
References
Branches

preg_replace_callback: documentation ( source)
strtoupper: documentation ( source)

preferences:dark modelive preview

43.24 ms | 402 KiB | 5 Q