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run code in 300+ PHP versions simultaneously
<?php function createReferenceInArray(): array { $foo = 'foo'; $result = ['foo' => &$foo]; debug_zval_dump($result); return $result; } $result = createReferenceInArray(); debug_zval_dump($result);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
array(1) refcount(2){ ["foo"]=> reference refcount(2) { string(3) "foo" interned } } array(1) refcount(2){ ["foo"]=> reference refcount(1) { string(3) "foo" interned } }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(1) refcount(2){ ["foo"]=> reference refcount(2) { string(3) "foo" interned } } array(1) refcount(2){ ["foo"]=> reference refcount(1) { string(3) "foo" interned } }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
array(1) refcount(2){ ["foo"]=> &string(3) "foo" refcount(1) } array(1) refcount(2){ ["foo"]=> string(3) "foo" refcount(1) }
preferences:
149.87 ms | 409 KiB | 5 Q