Description
int
strripos ( string haystack, string needle [, int offset] )
Returns the numeric position of the last occurrence of
needle in the
haystack string. Unlike
strrpos(), strripos() is
case-insensitive. Also note that string positions start at 0, and not
1.
Note that the needle may be a string of one or
more characters.
If needle is not found, FALSE is returned.
| 警告 |
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。 |
例子 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)";
}
?>
|
Outputs:
Congratulations!
We found the last (aB) in (ababcd) at position (2) |
|
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.
See also strrpos(),
strrchr(),
substr(), stripos() and
stristr().
strrev