Replace first match using preg_replace

Question

I need to extract the first occurence of gigabyte attribute from product description. With my regex preg_rex function it replace last match but I need to replace the first match (only the first).

This is for importing products from CSV files.

function getStringBetween($str, $to, $from){

echo preg_replace("/^.*$from([^$from]+)$to.*$/", '$1', $str);

}

$str = 'NGM YOU COLOR P550 DUAL SIM 5.5" IPS HD CURVO QUAD CORE 8GB RAM 1GB 4G LTE';

getStringBetween($str, "GB", " ");

From the string: "NGM YOU COLOR P550 DUAL SIM 5.5" IPS HD CURVO QUAD CORE 8GB RAM 1GB 4G LTE"

I expect: 8

It returns 1

If you use the updated answer to this question, it will return 8 as you want. 3v4l.org/QtQcf — Nick
– Nick, Commented Feb 5, 2019 at 1:21
Possible duplicate of Extract a substring betwen the closer SPACE and a certain character — Nick
– Nick, Commented Feb 5, 2019 at 1:21

Blue · Accepted Answer · 2019-02-05 00:51:44Z

1

In between with regex can be a bit difficult. I recommend using the quantifer \d+ to specify you're looking specifically for a digit character, and use preg_match to fetch the first result:

<?php
function getFirstGB($str){

    if (preg_match("/(\d+)GB/", $str, $matches)) {
        return $matches[1];
    } else {
        return false;
    }

}

$str = 'NGM YOU COLOR P550 DUAL SIM 5.5" IPS HD CURVO QUAD CORE 8GB RAM 1GB 4G LTE';

echo getFirstGB($str);

PHP Playground here.

answered Feb 5, 2019 at 0:51

Blue

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