How to separate letters and digits from a string in php

Question

I have a string which is combination of letters and digits. For my application i have to separate a string with letters and digits: ex:If my string is \"12jan\" i hav to ge

Answer 1

<?php
$data = "#c1";
$fin =  ltrim($data,'#c');
echo $fin;
?>

Answer 2

preg_match_all('/^(\d+)(\w+)$/', $str, $matches);

var_dump($matches);

$day = $matches[1][0];
$month = $matches[2][0];

Of course, this only works when your strings are exactly as described "abc123" (with no whitespace appended or prepended).

If you want to get all numbers and characters, you can do it with one regex.

preg_match_all('/(\d)|(\w)/', $str, $matches);

$numbers = implode($matches[1]);
$letters = implode($matches[2]);

var_dump($numbers, $letters);

See it!

Answer 3

This works for me as per my requirement, you can edit as per yours

function stringSeperator($string,$type_return){

    $numbers =array();
    $alpha = array();
    $array = str_split($string);
    for($x = 0; $x< count($array); $x++){
        if(is_numeric($array[$x]))
            array_push($numbers,$array[$x]);
        else
            array_push($alpha,$array[$x]);
    }// end for         

    $alpha = implode($alpha);
    $numbers = implode($numbers);

    if($type_return == 'number')    
    return $numbers;
    elseif($type_return == 'alpha')
    return $alpha;

}// end function

Answer 4

You can make use of preg_split to split your string at the point which is preceded by digit and is followed by letters as:

$arr = preg_split('/(?<=[0-9])(?=[a-z]+)/i',$str);

Code in Action

<?php
$str = '12jan';
$arr = preg_split('/(?<=[0-9])(?=[a-z]+)/i',$str);                                                               
print_r($arr);

Result:

Array
(
    [0] => 12
    [1] => jan
)

Answer 5

$numbers = preg_replace('/[^0-9]/', '', $str);
$letters = preg_replace('/[^a-zA-Z]/', '', $str);

Answer 6

Try This :

$string="12jan";
$chars = '';
$nums = '';
for ($index=0;$index<strlen($string);$index++) {
    if(isNumber($string[$index]))
        $nums .= $string[$index];
    else    
        $chars .= $string[$index];
}
echo "Chars: -$chars-<br>Nums: -$nums-";


function isNumber($c) {
    return preg_match('/[0-9]/', $c);
}