3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($a) { $page1 = isset($a['page']) ? $a['page'] : 1; echo 'P1: ', $page1, "\n"; $page2 = $a['page'] ?? 1; echo 'P2: ', $page2, "\n"; $page3 = array_key_exists('page', $_GET) ? $_GET['page'] : 1; echo 'P3: ', $page3, "\n"; echo $page1 === $page2 === $page3 ? 't' : 'n', "\n"; } $a = array('page' => 3); foo($a); $a = array(); foo($a); $a = array('page' => Null); foo($a); $a = array('page' => 0); foo($a); ?>
Output for 7.0.0 - 7.0.8
Parse error: syntax error, unexpected '===' (T_IS_IDENTICAL) in /in/gARH1 on line 15
Process exited with code 255.
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.23
Parse error: syntax error, unexpected '?' in /in/gARH1 on line 8
Process exited with code 255.
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188.54 ms | 1395 KiB | 77 Q