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 |
这个函数可能返回 Boolean FALSE，也可能返回一个与 FALSE 相等地非 Boolean 值，比如 0 或者 "" 。请参阅 Booleans 的有关章节以获取更多信息。请使用 === 操作符 来测试该函数的返回值。 |
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) |
|
offset may be specified to begin searching an
arbitrary number of characters into the string. Negative values will
stop searching at an arbitrary point prior to the end of the string.
See also strrpos(),
strrchr(),
substr(), stripos() and
stristr().
strrev
