从数组中提取数字

Question

How to extract only Numbers from an Array?

$myarray = array("A","B", "2","D");

I want to get numeric values ("2" in this example) from an array to a variable

Answer 1

You can use is-numeric and array-filter (PHP build-in functions):

$myarray = array("A", "B", "2", "D", "3");
$b = array_filter($myarray, "is_numeric");

Now $b is an array containing the strings: 2 and 3 .

Edited Regarding your comment: if you have only 1 value and you want to add 10 to it you can do:

$myarray = array("A", "B", "2", "D");
$b = array_filter($myarray, "is_numeric");
$c = array_values($b); //reset the keys
$finalvalue = $c[0] + 10; // will output 12

Answer 2

<?php
$input  = array('A','B', '2.2','D');

foreach($input as $v)
    is_numeric($v) && $nums[] = $v;

// Take the first numeric found and add 10.
$result = isset($nums[0]) ? $nums[0] + 10 : null;

var_dump($result);

Output:

float(12.2)