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run code in 300+ PHP versions simultaneously
<?php $var = "laruence"; $var_dup = $var; unset($var); debug_zval_dump($var_dup);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(8) "laruence" interned
Output for 7.0.0 - 7.0.29, 7.1.0 - 7.1.1, 7.1.7 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(8) "laruence" refcount(1)
Output for 7.1.2 - 7.1.6
string(8) "laruence" refcount(3)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.30
string(8) "laruence" refcount(2)
preferences:
246.56 ms | 402 KiB | 303 Q