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<?php $tests = array( 0, '0', '', null, ); foreach ($tests as $element) { if (is_numeric($element)) { echo "'{$element}' is numeric", PHP_EOL; } else { echo "'{$element}' is NOT numeric", PHP_EOL; } } ?>
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
'0' is numeric '0' is numeric '' is NOT numeric '' is NOT numeric
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
'0' is numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/D3g2G on line 11 PHP_EOL'0' is numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/D3g2G on line 11 PHP_EOL'' is NOT numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/D3g2G on line 13 PHP_EOL'' is NOT numeric Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/D3g2G on line 13 PHP_EOL
preferences:
246.36 ms | 403 KiB | 316 Q