String 함수 목록
PHP Manual

substr_count

(PHP 4, PHP 5)

substr_countCount the number of substring occurrences

설명

int substr_count ( string $haystack , string $needle [, int $offset= 0 [, int $length ]] )

substr_count() returns the number of times the needle substring occurs in the haystack string. Please note that needle is case sensitive.

Note: This function doesn't count overlapped substrings. See the example below!

인수

haystack

The string to search in

needle

The substring to search for

offset

The offset where to start counting

length

The maximum length after the specified offset to search for the substring. It outputs a warning if the offset plus the length is greater than the haystack length.

반환값

This functions returns an integer.

변경점

버전 설명
5.1.0 Added the offset and the length parameters

예제

Example #1 A substr_count() example

<?php
$text 
'This is a test';
echo 
strlen($text); // 14

echo substr_count($text'is'); // 2

// the string is reduced to 's is a test', so it prints 1
echo substr_count($text'is'3);

// the text is reduced to 's i', so it prints 0
echo substr_count($text'is'33);

// generates a warning because 5+10 > 14
echo substr_count($text'is'510);


// prints only 1, because it doesn't count overlapped subtrings
$text2 'gcdgcdgcd';
echo 
substr_count($text2'gcdgcd');
?>

참고


String 함수 목록
PHP Manual