Bug #79960 [Opn->Nab]: json_encode(JSON_NUMERIC_CHECK) works differently between 5.4.x and 7.x

Edit report at https://bugs.php.net/bug.php?id=79960&edit=1 ID: 79960 Updated by: cmb@php.net Reported by: danny at klarity dot tv Summary: json_encode(JSON_NUMERIC_CHECK) works differently between 5.4.x and 7.x -Status: Open +Status: Not a bug Type: Bug Package: JSON related Operating System: Centos 8 PHP Version: 7.2.33 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php This is because hexadecimal strings are no longer considered numeric as of PHP 7.0.0[1]. [1] <https://www.php.net/manual/en/migration70.incompatible.php#migration70.incompatible.strings.hex> Previous Comments: ------------------------------------------------------------------------ [2020-08-12 09:54:21] danny at klarity dot tv Description: ------------ After upgrading from PHP 5.4 to 7.2 (with OS upgrade) the behavior of json_encode with JSON_NUMERIC_CHECK changed. In 5.4, a hex string was converted to an int. In 7.2, a hex string is output as a hex string. Test script: --------------- $ php --version PHP 5.4.45 (cli) (built: Oct 16 2015 11:02:47) Copyright (c) 1997-2014 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies $ php --interactive php > print(json_encode("0xFF", JSON_NUMERIC_CHECK)); 255 $ php --version PHP 7.2.11 (cli) (built: Oct 9 2018 15:09:36) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies $ php --interactive Interactive shell php > print(json_encode("0xFF", JSON_NUMERIC_CHECK)); "0xFF" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79960&edit=1