3v4l.org

run code in 300+ PHP versions simultaneously
<?php $values = array(1,2); var_dump(isset($values[0]), $values[0]); var_dump(isset($values[0][0]), $values[0][0]);
Output for 8.3.0 - 8.3.4
bool(true) int(1) Warning: Trying to access array offset on int in /in/cU3MV on line 4 bool(false) NULL
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
bool(true) int(1) Warning: Trying to access array offset on value of type int in /in/cU3MV on line 4 bool(false) NULL
Output for 7.4.0 - 7.4.33
bool(true) int(1) Notice: Trying to access array offset on value of type int in /in/cU3MV on line 4 bool(false) NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 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, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33
bool(true) int(1) bool(false) NULL

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218 ms | 404 KiB | 335 Q