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@ 2020-07-08T10:41:15Z

<?php
$x = "I wish for choice cards spelling PREJOIN 'coz I love Nature.";
$words = explode(' ', $x);
$string = '';
foreach($words as $word){
    $string .= ((strtoupper($word) == $word && !in_array($word, array('I'))) ? '<b>' . $word . '</b>' : $word) . ' ';
}
echo $string;

Output
Performance
VLD
References
Branches

explode: documentation ( source)
strtoupper: documentation ( source)

preferences:dark modelive previewkey bindings

26.76 ms | 405 KiB | 5 Q