CODEWITHSUNDEEP
php
user7985499
user7985499

Reputation:

How to multiply two numbers in a string

I have a string like "1X6TAB". Now I apply some regular expression to this string to remove "TAB" and replacing "X" with "*", so my final string will be "1*6". The expected result is "6", but I get "1*6" as the result.

Code:

Regexonlynumber("1X6TAB");
function Regexonlynumber($number){
    $number = preg_replace("/[^0-9.X]/", '', $number);
    echo str_replace('X',"*",$number);die;
}

Upvotes: 7

Views: 1424

Answers (4)

Aman Kumar
Aman Kumar

Reputation: 4557

Regexonlynumber() function help you to to get product of numbers from string

array_product() Function :- The array_product() function calculates and returns the product of an array.

str_split() Function :- The str_split() function splits a string into an array.

<?php
    function Regexonlynumber($number){
        $number = preg_replace("/[^0-9,.]/", "", $number);
        echo array_product(str_split($number));
    }

    Regexonlynumber("1X6TAB");
?>

Upvotes: 2

Agnius Vasiliauskas
Agnius Vasiliauskas

Reputation: 11277

It's better to use eval(), which will also be able to compute more complex expressions:

Regexonlynumber("3X6-13TAB");
function Regexonlynumber($number){
    $number = preg_replace("/[^0-9.X\-\+\/]/", '', $number);
    $str = str_replace('X',"*",$number);
    eval("\$result = {$str};");
    echo $str . " = " . $result . "\n";
}

Upvotes: 2

Niklesh Raut
Niklesh Raut

Reputation: 34914

You are almost there. Just add one step more to explode and multiply, like this:

<?php
    function Regexonlynumber($number){
        $number = preg_replace("/[^0-9.X]/", '', $number);
        $arr = explode("X", $number);
        echo $arr[0]*$arr[1];
    }
    Regexonlynumber("2X6TAB");
?>

Demo.

You can even just do it like:

function Regexonlynumber($number){
    $arr = explode("X", $number);
    echo $arr[0]*$arr[1];
}

Demo.

Upvotes: 3

Luffy
Luffy

Reputation: 1026

Instead of str_replace(), you can explode() it by 'X' delimiter, then use array_product().

Regexonlynumber("1X6TAB");
function Regexonlynumber($number){
    $number = preg_replace("/[^0-9.X]/", '', $number);
    echo array_product(explode('X', $number));
}

Upvotes: 12

Related Questions