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<?php $fileContent = '12em\n1.3 em'; preg_replace_callback('/([0-9,-\.]+)\s*(em)/', 'replace_em', $fileContent); function replace_em($value) { return $value * 123; }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Unsupported operand types: array * int in /in/uRr5k:6 Stack trace: #0 [internal function]: replace_em(Array) #1 /in/uRr5k(3): preg_replace_callback('/([0-9,-\\.]+)\\s...', 'replace_em', '12em\\n1.3 em') #2 {main} thrown in /in/uRr5k on line 6
Process exited with code 255.

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