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strposPodręcznik PHPPoprzedniNastępnystrpos (PHP 3, PHP 4 >= 4.0.0)strpos --
Find position of first occurrence of a string
Descriptionint strpos ( string haystack, string needle [, int offset]) Returns the numeric position of the first occurrence of
needle in the
haystack string. Unlike the
strrpos(), this function can take a full
string as the needle parameter and the
entire string will be used.
If needle is not found, returns FALSE.
Notatka:
It is easy to mistake the return values for "character found at
position 0" and "character not found". Here's how to detect
the difference:
// in PHP 4.0b3 and newer:
$pos = strpos($mystring, "b");
if ($pos === false) { // note: three equal signs
// not found...
}
// in versions older than 4.0b3:
$pos = strpos($mystring, "b");
if (!is_integer($pos)) {
// not found...
}
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 strrpos(),
strrchr(), substr(),
stristr(), and strstr().
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