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run code in 150+ php & hhvm versions
Bugs & Features
<?PHP class cat { public function show_output($prepend, $output = '') {echo $prepend . $output;} public function show_out($output) {echo $output;} } $cat = new cat(); $cat->show_output('Files: ', trim(`ls`)); // this gives invalid args to shell_exec $cat->show_output('Files: ', `ls`); // this causes a segmentation fault $cat->show_out(`ls`); // this causes a segmentation fault function show_outputa($prepend, $output) {echo $prepend . $output;} show_outputa('Files: ', `ls`); // this works as expected
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.6.28, 7.0.0 - 7.1.0
Files: Files: Files:
Output for hhvm-3.12.0
Files: Failed to exec: `ls'Files: Failed to exec: `ls' Failed to exec: `ls' Files: Failed to exec: `ls'
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/sPht8 on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/sPht8 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/sPht8 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/sPht8 on line 3
Process exited with code 255.