strripos
(PHP 5)
strripos — Find position of last occurrence of a case-insensitive string in a string
说明
int strripos
( string $haystack
, string $needle
[, int $offset
] )
Find position of last occurrence of a case-insensitive string in a string.
Unlike strrpos(), strripos() is
case-insensitive.
参数
-
haystack
-
-
needle
-
Note that the needle
may be a string of one or
more characters.
-
offset
-
The offset
parameter may be specified to begin
searching an arbitrary number of characters into the string.
Negative offset values will start the search at
offset
characters from the
start of the string.
返回值
Returns the numerical position of the last occurence of
needle
. Also note that string positions start at 0,
and not 1.
If needle
is not found, FALSE is returned.
Warning本函数可能返回布尔值
FALSE，但也可能返回一个与 FALSE 等值的非布尔值，例如
0 或者 ""。请参阅布尔类型章节以获取更多信息。应使用
=== 运算符来测试本函数的返回值。
范例
Example#1 A simple strripos() example
<?php
$haystack = 'ababcd';
$needle = 'aB';
$pos = strripos($haystack, $needle);
if ($pos === false) {
echo "Sorry, we did not find ($needle) in ($haystack)";
} else {
echo "Congratulations!\n";
echo "We found the last ($needle) in ($haystack) at position ($pos)";
}
?>
Congratulations!
We found the last (aB) in (ababcd) at position (2)