stristr()

(PHP 4, PHP 5, PHP 7)

strstr()函数的忽略大小写版本

说明

返回$haystack字符串从$needle第一次出现的位置开始到结尾的字符串。

参数

在该字符串中查找。

如果$needle不是一个字符串，那么它将被转换为整型并被视为字符顺序值。

若为TRUE，strstr()将返回$needle在$haystack中的位置之前的部分(不包括 needle)。

参数$needle和$haystack将以不区分大小写的方式对待。

返回值

返回匹配的子字符串。如果$needle未找到，返回FALSE。

更新日志

范例

Example #1stristr()范例

测试字符串的存在与否

使用非字符串 needle

注释

Note:此函数可安全用于二进制对象。

参见

• strstr()查找字符串的首次出现
• strrchr()查找指定字符在字符串中的最后一次出现
• stripos()查找字符串首次出现的位置（不区分大小写）
• strpbrk()在字符串中查找一组字符的任何一个字符
• preg_match()执行匹配正则表达式

There was a change in PHP 4.2.3 that can cause a warning message
to be generated when using stristr(), even though no message was
generated in older versions of PHP.
The following will generate a warning message in 4.0.6 and 4.2.3:
 stristr("haystack", "");
   OR
 $needle = ""; stristr("haystack", $needle);
This will _not_ generate an "Empty Delimiter" warning message in
4.0.6, but _will_ in 4.2.3:
 unset($needle); stristr("haystack", $needle);
Here's a URL that documents what was changed:
http://groups.google.ca/groups?selm=cvshholzgra1031224321%40cvsserver

Just been caught out by stristr trying to converting the needle from an Int to an ASCII value.
Got round this by casting the value to a string.

An example for the stristr() function:

It will look in $a for "like php" (NOT case sensetive. though, strstr() is case-sensetive).
For the ones of you who uses linux.. It is similiar to the "grep" command.
Actually.. "grep -i".

I think there is a bug in php 5.3 in stristr with uppercase Ä containing other character
http://pastebin.com/5bP6uztY
if you search only with täry it works, but as soon as the word is tärylä it does not. TÄRYL works fine

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