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run code in 150+ php & hhvm versions
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<?php $filepath = 'path'; $location = 'location'; $file_name = 'name'; var_dump(("$file_path, $location/" . $file_name));
based on jmHqS
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: file_path in /in/205bI on line 7 string(15) ", location/name"
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: file_path in /in/205bI on line 7 string(15) ", location/name"