strpos/stripos（严格比较）失败

Question

我目前有以下 strpos/stripos（都尝试过，不会改变结果），用于标记论坛帖子中的某些针。

if (stripos($row->message, (string)$commit) !== false) {
  // Do stuff
}

Stuff 大部分都可以正常工作，但是，在少数情况下，当 haystack ($row->message) 包含针 ($commit) 时（使用强制转换，因为 $commit 可以是 int）strpos/stripos 返回 false。

例如：

$test = stripos($row->message, (string)$commit);

一个非工作场景的例子是：

// (string)$commit 
string(7) "818df50"
// $row->message
string(321) "Intro. Crashes as soon as the main menu is shown. Graphics are horribly broken, no fixes have been found as of yet. [attachment=194] Build Used: Pull Request #3333 (0.0.3-5929) -> RPCS3-v0.0.3-2017-08-27-818f50b Side note: States it can display at 1080p, yet it is boxed in 1080p. However, it is fine in 720p."
// $test (strpos/stripos) 
bool(false)

一个工作场景的例子是：

// (string)$commit
string(7) "2570911" 
// $row->message
string(219) "RPCS3 v0.0.3-3-2570911 Alpha The game doesn't even show its graphics window. [quote] ·F 0:00:34.138812 {PPU[0x1000000] Thread (main_thread) [0x0087c094]} MEM: Access violation writing location 0xcffff2d0 [/quote]" int(15) [2570911]
// $test (strpos/stripos)
int(15) [2570911]

我不知道我是否遗漏了一些非常明显的东西，我检查了几次，方法似乎是正确的。

注意：我知道有很多方法可以做到这一点，但在这个特定的场景中，我需要这些字符串比较。

提前致谢。

Answer 1

在你的例子中......

// (string)$commit 
string(7) "818df50"
// $row->message
string(321) "Intro. Crashes as soon as the main menu is shown. Graphics are horribly broken, no fixes have been found as of yet. [attachment=194] Build Used: Pull Request #3333 (0.0.3-5929) -> RPCS3-v0.0.3-2017-08-27-818f50b Side note: States it can display at 1080p, yet it is boxed in 1080p. However, it is fine in 720p."
// $test (strpos/stripos) 
bool(false)

大海捞针中没有针818df50。 haystack 包含一个非常接近的字符串 (818f50)，但这不是完全匹配。

所以...它正在执行正确的操作。