Question

How to find all lowercase characters in a string with PHP

Answer 1

$str = "JavaScript C C++ PHP NodeJS";
$size = strlen($str);

for ($i = 0; $i < $size; $i++) {
    if ($str[$i] >= 'a' && $str[$i] <= 'z')
        echo $str[$i] . ' ';
            
}





/*
run:

a v a c r i p t o d e 

*/

 

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Answer 2

$str = "JavaScript C C++ PHP NodeJS";

preg_match_all('/[a-z]/', $str, $matches, PREG_OFFSET_CAPTURE);

print_r($matches[0]);





/*
run:

Array
(
    [0] => Array
        (
            [0] => a
            [1] => 1
        )

    [1] => Array
        (
            [0] => v
            [1] => 2
        )

    [2] => Array
        (
            [0] => a
            [1] => 3
        )

    [3] => Array
        (
            [0] => c
            [1] => 5
        )

    [4] => Array
        (
            [0] => r
            [1] => 6
        )

    [5] => Array
        (
            [0] => i
            [1] => 7
        )

    [6] => Array
        (
            [0] => p
            [1] => 8
        )

    [7] => Array
        (
            [0] => t
            [1] => 9
        )

    [8] => Array
        (
            [0] => o
            [1] => 22
        )

    [9] => Array
        (
            [0] => d
            [1] => 23
        )

    [10] => Array
        (
            [0] => e
            [1] => 24
        )

)

*/

 

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