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# substr_count

(PHP 4, PHP 5)

substr_count — Count 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($text, 'is', 3, 3);
// generates a warning because 5+10 > 14
echo substr_count($text, 'is', 5, 10);
// prints only 1, because it doesn't count overlapped subtrings
$text2 = 'gcdgcdgcd';
echo substr_count($text2, 'gcdgcd');
?>`

### 참고

- count_chars() - 문자열 안에 사용한 문자에 대한 정보를 반환
- strpos() - 문자열이 처음 나타나는 위치를 찾습니다
- substr() - Return part of a string
- strstr() - 문자열이 처음으로 나오는 부분을 찾습니다

substr_compare
substr_replace
String 함수 목록
PHP Manual