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<?php print_r([ 'substr without length' => substr('Hello World', 1), 'substr with null length' => substr('Hello World', 1, null), 'mb_substr without length' => mb_substr('Hello World', 1), 'mb_substr with null length' => mb_substr('Hello World', 1, null), ]);
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/YpuO1 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/YpuO1 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/YpuO1 on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.7
Array ( [substr without length] => ello World [substr with null length] => [mb_substr without length] => ello World [mb_substr with null length] => )
Output for 5.4.8 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Array ( [substr without length] => ello World [substr with null length] => [mb_substr without length] => ello World [mb_substr with null length] => ello World )
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Array ( [substr without length] => ello World [substr with null length] => ello World [mb_substr without length] => ello World [mb_substr with null length] => ello World )
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