3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr('', 0, 5)); var_dump(substr(null, 0, 5)); var_dump(sprintf("%s", false));
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(0) "" Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /in/aMAMq on line 4 string(0) "" string(0) ""
Output for 7.0.0 - 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
string(0) "" string(0) "" string(0) ""
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
bool(false) bool(false) string(0) ""

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167.87 ms | 401 KiB | 194 Q