Sec Bug->Bug #78865 [Opn->Nab]: Does not check information from the "GET data" correctly

Edit report at https://bugs.php.net/bug.php?id=78865&edit=1 ID: 78865 Updated by: cmb@php.net Reported by: facemxd at hotmail dot com Summary: Does not check information from the "GET data" correctly -Status: Open +Status: Not a bug -Type: Security +Type: Bug Package: *Regular Expressions Operating System: windows 10 x64 PHP Version: 7.3.12 -Assigned To: +Assigned To: cmb Block user comment: N Private report: Y New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. For a start, do var_dump($_GET['number']); Previous Comments: ------------------------------------------------------------------------ [2019-11-23 12:34:59] facemxd at hotmail dot com Description: ------------ hi PHP I write a function. only numbers turn true. but it returns true when you get parameter add the # character test.php file code : why does it give such an error? I just detected the # character. please help me, what is the problem?. have a nice day :) testing info : XAMPP & PHP 7.3.1 & x64 win10 & chrome 78 Test script: --------------- // test.php function number_is_valid($get_data){ return ( preg_match('/[^0-9]/', $get_data) ) ? "NO" : "YES"; } $data = $_GET['number']; $result = number_is_valid($data); print_r($result); Testing results : test.php?number=a4 // result NO test.php?number=4 // result YES test.php?number=4# // result YES test.php?number=4#@# // result YES but no problem with data from variable $data = "4#"; $result = number_is_valid($data); // result NO ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78865&edit=1