<?php $strings = [ "test string", "lado lomidze needs a solution", "i made some research and found 'good' answers here; they really helped me." ]; // if not already all lowercase, use strtolower() foreach ($strings as &$string) { for ($i = 0, $len = strlen($string); $i < $len; $i += 2) { $string[$i] = strtoupper($string[$i]); } } var_export($strings);
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Value for `_results` contains invalid data `array`