Get string between numbers using PHP

Question

How can I adapt this function below to get string between numbers?

Function:

function getInbetweenStrings($start, $end, $str){
    $matches = array();
    $regex = "/$start([a-zA-Z0-9_]*)$end/";
    preg_match_all($regex, $str, $matches);
   return $matches[1];
}

Example:

1448459casa48912687
010697046a-parede-verde698012
456902sim-senhora4401254

Output expected:

casa
a-parede-verde
sim-senhora

Thank you. @edit: I don't want to remove all numbers, I need them! I just want grab string between.

Sorry, I don't want to remove all numbers, I need them! I just want grab string between. — darox
– darox, Commented May 23, 2019 at 8:18
What is supposed to happen in the case of something like 12345number10-downing-street54321 ? — CD001
– CD001, Commented May 23, 2019 at 8:20
@CD001 is possible to detect only first numbers and last numbers? The middle numbers in this situation belongs to the string. — darox
– darox, Commented May 23, 2019 at 8:21

Nick · Accepted Answer · 2019-05-23 08:31:30Z

2

You can use this regex, which looks for a minimal sequence (by adding ? to .*) of characters between starting and trailing digits:

^\d+(.*?)\d+$

In PHP:

$strings = array('1448459casa48912687',
                 '010697046a-parede-verde698012',
                 '456902sim-senhora4401254',
                 '12345number10-downing-street54321');

foreach ($strings as $string) {
    $between = preg_replace('/^\d+(.*?)\d+$/', '$1', $string);
    echo "$between\n";
}

Output:

casa
a-parede-verde 
sim-senhora
number10-downing-street

Demo on 3v4l.org

answered May 23, 2019 at 8:31

Nick

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Comments

Sethu · Accepted Answer · 2019-05-23 08:26:08Z

1

If the strings are different (ie: [foo] & [/foo])

function get_string_between($string, $start, $end){
    $string = ' ' . $string;
    $ini = strpos($string, $start);
    if ($ini == 0) return '';
    $ini += strlen($start);
    $len = strpos($string, $end, $ini) - $ini;
    return substr($string, $ini, $len);
}



$fullstring = '010697046a-parede-verde698012';
$parsed = get_string_between($fullstring, '010697046a', '698012');

echo $parsed; // (result = a-parede-verde)

edited May 23, 2019 at 8:26

answered May 23, 2019 at 8:18

Sethu

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3 Comments

darox Over a year ago

Sorry, I don't want to remove all numbers, I need them! I just want grab string between.

darox Over a year ago

The number will always change, I need a way to grab string between numbers that still always changing

Sethu Over a year ago

then you're supposed to use preg_replace('/^\d+(.*?)\d+$/', '$1', $fullstring) which will grab the text between numbers i hope

mickmackusa · Accepted Answer · 2024-07-02 00:44:32Z

The effect of Nick's answer is to remove all leading and trailing digits from the strings, but PHP already has trim() which can do this -- there is no need for the expense of a regex function.

Code: (Demo)

$array = [
    '1448459casa48912687',
    '010697046a-parede-verde698012',
    '456902sim-senhora4401254',
];

var_export(
    array_map(fn($v) => trim($v, '0..9'), $array)
);

Mind you, 0..9 is a bit of an odd syntax for PHP, but it is a mechanism to denote a range of characters on the ascii table. Read more about double-dot syntax.

If code brevity is more important than performance, you can affect the entire array with a single preg_replace() call -- just remove one or more digits which are at the start or end of the strings. (Demo)

var_export(
    preg_replace('/^\d+|\d+$/', '', $array)
);

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