2022年8月31日 · While the bug report says it was fine to return null, this is incorrect. All official PHP releases from PHP 4.3 to PHP 7.3 do not return null from these functions. I suspect it may've been an alpha or beta release, and regardless of the bug being closed is invalid, it was fixed.

2014年9月15日 · Many other string-based functions in PHP likely suffer from similar issues. Working around this is tricky, especially in PHP where you don't actually know what a lot of functions are really doing at the physical level. One possible tactic is just sticking a random wait time in your code before you return the answer to the caller/potential attacker.

For regular string comparison I always use it's case sensitive brother 'strcmp' you can never be too careful with PHP's loose typing. – user83632 Commented Oct 30, 2009 at 16:40

2012年5月15日 · If you rely on strcmp for safe string comparisons, both parameters must be strings, the result is otherwise extremely unpredictable. For instance you may get an unexpected 0, or return values of NULL, -2, 2, 3 and -3.

2022年4月1日 · Firstly, two things to bear in mind: PHP 8.1 deprecates these calls, it does not make them errors.The purpose of deprecation is to give authors advance notice to fix their code, so you and the authors of libraries you use have until PHP 9.0 comes out to fix things.

2018年3月7日 · On index.php, they returned "index.php" and "-58" respectively.It shocked me. Why would comparing "index.php" and "index.php" result in a strcmp return value of -58? When I changed the code to /* * This function checks to see if the page name given is …

2014年8月14日 · PHP strcmp not giving correct output. 1. unable to use strcmp function. 0. PHP: strcmp does not work? 2 ...

Quisiera saber como funciona strcmp en PHP, ya que tengo una duda en cuanto al resultado que arroja, se que cuando se compara y son igualas dara como resultado 0, pero en otros casos el resultado varia un poco (1,-1,5,45 etc.), cuales serian algunos ejemplos en el que varien los resultados con una breve explicacion.

2011年11月30日 · I'm trying to compare a specific part of a url to get a list of the endings (which are resource/'location' where location is either state initials or a string). I'm using this to populate a drop down

2015年5月21日 · Its a new operator for combined comparison. Similar to strcmp() or version_compare() in behavior, but it can be used on all generic PHP values with the same semantics as <, <=, ==, >=, >. It returns 0 if both operands are equal, 1 if the left is greater, and -1 if the right is greater.