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<?php function calculate_string( $mathString ) { $mathString = trim($mathString); // trim white spaces $mathString = preg_replace('#[^0-9\+-\*\/\(\) ]#', '', $mathString); // remove any non-numbers chars; exception for math operators var_dump($mathString); $compute = create_function("", "return (" . $mathString . ");" ); return 0 + $compute(); } $string = " (1 + 1) * (2 + 2)"; echo calculate_string($string); // outputs 8
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: preg_replace(): Compilation failed: range out of order in character class at offset 9 in /in/NiJgY on line 4 NULL Fatal error: Uncaught Error: Call to undefined function create_function() in /in/NiJgY:6 Stack trace: #0 /in/NiJgY(11): calculate_string(NULL) #1 {main} thrown in /in/NiJgY on line 6
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: preg_replace(): Compilation failed: range out of order in character class at offset 9 in /in/NiJgY on line 4 NULL Fatal error: Uncaught Error: Call to undefined function create_function() in /in/NiJgY:6 Stack trace: #0 /in/NiJgY(11): calculate_string(NULL) #1 {main} thrown in /in/NiJgY on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Warning: preg_replace(): Compilation failed: range out of order in character class at offset 9 in /in/NiJgY on line 4 NULL Deprecated: Function create_function() is deprecated in /in/NiJgY on line 6 Parse error: syntax error, unexpected ')' in /in/NiJgY(6) : runtime-created function on line 1
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.3.32 - 7.3.33
Warning: preg_replace(): Compilation failed: range out of order in character class at offset 9 in /in/NiJgY on line 4 NULL Parse error: syntax error, unexpected ')' in /in/NiJgY(6) : runtime-created function on line 1
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: preg_replace(): Compilation failed: range out of order in character class at offset 9 in /in/NiJgY on line 4 NULL Parse error: syntax error, unexpected ')' in /in/NiJgY(6) : runtime-created function on line 1 Fatal error: Function name must be a string in /in/NiJgY on line 7
Process exited with code 255.
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