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<?php function check_int($i) { if (preg_match('[^0-9]', $i)) { return 0; } else { return 1; } } function check_int1($i) { return (str_val((int)$i) === str_val($i)); } echo check_int1("5");
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function str_val() in /in/T0si2:12 Stack trace: #0 /in/T0si2(16): check_int1('5') #1 {main} thrown in /in/T0si2 on line 12
Process exited with code 255.
Output for 5.0.0 - 5.6.28
Fatal error: Call to undefined function str_val() in /in/T0si2 on line 12
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: str_val() in /in/T0si2 on line 12
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: str_val() in /in/T0si2 on line 12
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: str_val() in /in/T0si2 on line 12