(PHP 5)
stripos — Find position of first occurrence of a case-insensitive string
Returns the numeric position of the first occurrence of needle in the haystack string.
Unlike strpos(), stripos() is case-insensitive.
The string to search in
Note that the needle may be a string of one or more characters.
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 beginning of haystack.
If needle is not found, stripos() will return boolean FALSE.
Esta función quizá devuelve Boolean FALSE, pero quizá también devuelve un valor non-Boolean que se evaluará como FALSE, como 0 o "". Por favor lea la sección en Booleans para más información. Use el operador === para testear el valor devuelto por esta función.
Example #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";
}
?>
Note: Esta función es segura binariamente.