String position php

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strpos — Find the position of the first occurrence of a substring in a string




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strpos — Find the position of the first occurrence of a substring in a string


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strpos — Find the position of the first occurrence of a substring in a string


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strpos — Find the position of the first occurrence of a substring in a string


Parameters

haystaông xã The string to search in.

needle

Prior khổng lồ obatambeienwasirherbal.com. 8.0.0, if needle is not a string, it is converted khổng lồ an integer and applied as the ordinal value of a character. This behavior is deprecated as of obatambeienwasirherbal.com.. 7.3.0, & relying on it is highly discouraged. Depending on the intended behavior, the needle should either be explicitly cast to string, or an explicit call to chr() should be performed.

offphối

If specified, tìm kiếm will start this number of characters counted from the beginning of the string. If the offset is negative sầu, the search will start this number of characters counted from the over of the string.


Return Values

Returns the position of where the needle exists relative khổng lồ the beginning of the haystaông chồng string (independent of offset). Also note that string positions start at 0, and not 1.

Returns false if the needle was not found.


Warning

This function may return Boolean false, but may also return a non-Boolean value which evaluates lớn false. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.


Changelog

Version Description 8.0.0 Passing an int as needle is no longer supported. 7.3.0 Passing an int as needle has been deprecated. 7.1.0 Support for negative offsets has been added.

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strpos — Find the position of the first occurrence of a substring in a string




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strpos — Find the position of the first occurrence of a substring in a string


$mystring "abc";
$findme   "a";
$pos strpos($mystring$findme);

// Note our use of ===.  Simply == would not work as expected
// because the position of "a" was the 0th (first) character.
if ($pos === false)  else 
?>

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strpos — Find the position of the first occurrence of a substring in a string


$mystring "abc";
$findme   "a";
$pos strpos($mystring$findme);

// The !== operator can also be used.  Using != would not work as expected
// because the position of "a" is 0. The statement (0 != false) evaluates
// to false.
if ($pos !== false)  else 
?>

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strpos — Find the position of the first occurrence of a substring in a string


// We can search for the character, ignoring anything before the offset
$newstring "abcdef abcdef";
$pos strpos($newstring"a"1); // $pos = 7, not 0
?>

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strpos — Find the position of the first occurrence of a substring in a string


See Also

stripos() - Find the position of the first occurrence of a case-insensitive substring in a string str_contains() - Determine if a string contains a given substring str_ends_with() - Checks if a string ends with a given substring str_starts_with() - Checks if a string starts with a given substring strrpos() - Find the position of the last occurrence of a substring in a string strripos() - Find the position of the last occurrence of a case-insensitive sầu substring in a string strstr() - Find the first occurrence of a string strpbrk() - Search a string for any of a set of characters substr() - Return part of a string preg_match() - Perkhung a regular expression match




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