diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/FunctionHandler/Math.php | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/FunctionHandler/Math.php b/src/FunctionHandler/Math.php index aed1cb92..f8236ca9 100644 --- a/src/FunctionHandler/Math.php +++ b/src/FunctionHandler/Math.php @@ -66,7 +66,7 @@ class Math extends Base { $equation = preg_replace('/\s+/', '', $equation); // Adapted from https://www.php.net/manual/en/function.eval.php#107377 - $number = '(?:\d+(?:[,.]\d+)?|pi|π)'; // What is a number + $number = '-?(?:\d+(?:[,.]\d+)?|pi|π)'; // What is a number $functionsOrVars = '((?:0x[a-fA-F0-9]+)|([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*))'; $operators = '[,+\/*\^%-]'; // Allowed math operators $regexp = '/^((' . $number . '|' . $functionsOrVars . '|(' . $functionsOrVars . '\s*\((?1)*\)|\((?1)*\)))(?:' . $operators . '(?1))?)+$/'; |