(PHP 5)
strripos — Find position of last occurrence of a case-insensitive string in a string
Find position of last occurrence of a case-insensitive string in a string. Unlike strrpos(), strripos() is case-insensitive.
Note that the needle may be a string of one or more characters.
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.
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.
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)";
}
?>
上例将输出：
Congratulations! We found the last (aB) in (ababcd) at position (2)