<?php $string = 'this is a string'; // Test 1 if (isset($string['check'][0])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 2 if (isset($string[0])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 3 if (isset($string['check'])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; // Test 4 if (isset($string['check'][100])) { echo 'found'; } else { echo 'not found'; } echo '<hr />'; var_dump($string['check'][0]); // Warning throw out
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