Counting the number of specific characters inside string

Question

I\'m sorry, I just found a new problem due to my question about: Get The Number of Sepecific String Inside String.

I have been trying hard, how to find the number of

Answer 1

A possible solution using regular expression:

function get_num_chars($char) {
    $string = '120201M, 121212M-1, 21121212M, 232323M-2, 32323K, 323232K-1';
    return preg_match_all('/'.$char.'(?=,|$)/', $string, $m);
}

echo get_num_chars('M');    // 2
echo get_num_chars('M-1');  // 1
echo get_num_chars('M-2');  // 1
echo get_num_chars('K');    // 1
echo get_num_chars('K-1');  // 1

Answer 2

$k_count = substr_count($string, 'K') - substr_count($string, 'K-');
$k1_count = substr_count($string, 'K-1');

or

Counting K not followed by dash as follows:

$k_count = preg_match_all('/*K(?!-)/*', $string, $out);

Answer 3

Try this, it might not be feasible but addresses your problem

function get_num_chars($char) {

    $string = '120201M, 121212M-1, 21121212M, 232323M-2, 32323K, 323232K-1';
    echo substr_count($string, $char);
}
get_num_chars('M,');
get_num_chars('M-1');
get_num_chars('k,');

Answer 4

Check this,

$string = '120201M, 121212M-1, 21121212M, 232323M-2, 32323K, 323232K-1';
$arrString = explode($string,'M');
echo $stringCount = count($arrString);

Answer 5

It is possible with substr_count()

I think you are not passing value in it properly try like this

$string = '120201M, 121212M-1, 21121212M, 232323M-2, 32323K, 323232K-1';

echo substr_count($string, 'K-1');//echo's 1

echo substr_count($string, 'K');// echo's 2

Answer 6

Try this

 $string = '120201M, 121212M-1, 21121212M, 232323M-2, 32323K, 323232K-1';

 $wordCounts = array_count_values(str_word_count($string,1));

 echo $mCount = (isset($wordCounts['M-'])) ? $wordCounts['M'] : 0;

But here one thing You can just pass the 'M-' or 'M' not 'M-1' it is some workaround for what you want. Beacuse str_word_count matches exact word count been used.