How can I count white spaces using substr_count() in PHP

how can I count the numb开发者_JAVA技巧er of white spaces in a file using PHP?

I have tried the substr function but it isn't working.

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One way could be to remove all other characters and count what's left. You could do this with something like the following:

$count_var = preg_replace('[^\s]', '', $string);
$count = strlen($count_var);

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Replace any non-whitespace with nothing, count the result:

echo strlen(preg_replace('/\S/', '', $text));

This works for any whitespace, including tabs the like.
substr_count should work fine though for regular spaces:

echo substr_count($text, ' ');

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int substr_count ( string $haystack , string $needle [, int $offset = 0 [, int $length ]] ) http://br3.php.net/manual/en/function.substr-count.php

<?php
$text = 'This is a test';

echo substr_count($text, ' '); // 3
?>

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use:

$test = "sadlk asd sad sda";
$whitespaces = substr_count($test," ");

substr_count()