Podręcznik PHP
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# substr_count

(PHP 4, PHP 5)

substr_count -- Count the number of substring occurrences

## Opis

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

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

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

## Parametry

`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.

## Zwracane wartości

This functions returns an integer.

## Rejestr zmian

Wersja | Opis
--- | ---
5.1.0 | Added the `offset` and the `length` parameters

## Przykłady

Przykład 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');
?>`

## Patrz także

count_chars()
strpos()
substr()
strstr()

Poprzedni | Spis treści | Następny
substr_compare | Początek rozdziału | substr_replace