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run code in 300+ PHP versions simultaneously
<?php foreach(["Hello World!",'','0',1,0,0.0,[],[1,2,3],true,false]as$e) echo var_export($e,1).' : '.var_export((bool)$e,1).'<br>';
Output for 7.0.2 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.4, 8.3.6
'Hello World!' : true<br>'' : false<br>'0' : false<br>1 : true<br>0 : false<br>0.0 : false<br>array ( ) : false<br>array ( 0 => 1, 1 => 2, 2 => 3, ) : true<br>true : true<br>false : false<br>
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 'Hello World!' : true<br>'' : false<br>'0' : false<br>1 : true<br>0 : false<br>0.0 : false<br>array ( ) : false<br>array ( 0 => 1, 1 => 2, 2 => 3, ) : true<br>true : true<br>false : false<br>
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.1
'Hello World!' : true<br>'' : false<br>'0' : false<br>1 : true<br>0 : false<br>0 : false<br>array ( ) : false<br>array ( 0 => 1, 1 => 2, 2 => 3, ) : true<br>true : true<br>false : false<br>

preferences:
191.19 ms | 402 KiB | 242 Q