stripos
(PHP 5)
stripos --
Find position of first occurrence of a case-insensitive string
Description
int
stripos ( string haystack, string needle [, int offset] )
Returns the numeric position of the first occurrence of
needle in the haystack
string. Unlike strpos(),
stripos() is case-insensitive.
Note that the needle may be a string of one or
more characters.
If needle is not found,
stripos() will return boolean FALSE.
警告 |
這個函數可能回傳布林值 FALSE,但也可能回傳一個同於 FALSE 的非布林值,像是0或 ""請參考Booleans此節有更多資訊。使用 === 運算子來測試這個函數的回傳值。 |
範例 1. stripos() examples
<?php $findme = 'a'; $mystring1 = 'xyz'; $mystring2 = 'ABC';
$pos1 = stripos($mystring1, $findme); $pos2 = stripos($mystring2, $findme);
// Nope, 'a' is certainly not in 'xyz' if ($pos1 === false) { echo "The string '$findme' was not found in the string '$mystring1'"; }
// Note our use of ===. Simply == would not work as expected // because the position of 'a' is the 0th (first) character. if ($pos2 !== false) { echo "We found '$findme' in '$mystring2' at position $pos2"; } ?>
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If needle is not a string, it is converted
to an integer and applied as the ordinal value of a character.
The optional offset parameter allows you
to specify which character in haystack to
start searching. The position returned is still relative to the
the beginning of haystack.
See also strpos(), strrpos(),
strrchr(), substr(),
stristr(), strstr(),
strripos() and str_ireplace().