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<?php $number = '1,2'; echo is_numeric(number_format($number));
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: number_format(): Argument #1 ($num) must be of type int|float, string given in /in/JpmFT:4 Stack trace: #0 /in/JpmFT(4): number_format('1,2') #1 {main} thrown in /in/JpmFT on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught TypeError: number_format(): Argument #1 ($num) must be of type float, string given in /in/JpmFT:4 Stack trace: #0 /in/JpmFT(4): number_format('1,2') #1 {main} thrown in /in/JpmFT on line 4
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: A non well formed numeric value encountered in /in/JpmFT on line 4 1
Output for 7.3.32 - 7.3.33
1

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