substr_count

substr_count

Count the number of substring occurrences

int **substr_count** string $haystack string $needle int $offset  $length

returns the number of times the
substring occurs in the
string. Please note that
is case sensitive.

substr_count``needle``haystack``needle

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

haystackThe string to search in

needleThe substring to search for

offsetThe offset where to start counting. If the offset is negative, counting starts from the end of the string.

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 length. A negative length counts from the end of . haystack``haystack

This function returns an . int

Voorbeeld: A example

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

echo substr_count($text, 'is'), PHP_EOL; // 2

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

// the text is reduced to 's i', so it prints 0
echo substr_count($text, 'is', 3, 3), PHP_EOL;

// prints only 1, because it doesn't count overlapped substrings
$text2 = 'gcdgcdgcd';
echo substr_count($text2, 'gcdgcd'), PHP_EOL;

// throws an exception because 5+10 > 14
echo substr_count($text, 'is', 5, 10), PHP_EOL;
?>

count_chars``strpos``substr``strstr