从php中的字符串中获取数字

Question

$string = '763:74
74:274
177:474';

$number = array('763', '74', '177');

I need to get the corresponding values of $number from $string. Example: if number = 763 I need string value 74. If number = 74 I need string value 274 and so on.

What right now what I'm doing is exploding $string at : character, looping and matching.

Looking for some better solution.

Answer 1

This should work for you:

First I split the string with preg_split() and use a new line as delimiter ( ), where I also consume all spaces (\s*) on the right and left side, so you don't have them in the key:

preg_split("/\s*
\s*/", $string)

Then I go through each pair of numbers (x:y) with array_map() and explode() it by a colon. So you end up with an array like this:

Array
(
    [0] => Array
        (
            [0] => 763
            [1] => 74
        )

    [1] => Array
        (
            [0] => 74
            [1] => 274
        )

    [2] => Array
        (
            [0] => 177
            [1] => 474
        )

)

At the end I use array_column() to say, that you want to use the 0st column as key and the 1st column as value.

Code:

<?php

    $string = '763:74
    74:274
    177:474';

    $result = array_column(
        array_map(function($v){
            return explode(":", $v);
        }, preg_split("/\s*
\s*/", $string)
    ), 1, 0);

    print_r($result);

?>

output:

Array
(
    [763] => 74
    [74] => 274
    [177] => 474
)