循环和清除数组

Question

I have arrays within arrays, all with varying amounts of information. My CSV table currently has the fields Name, Email, and Phone Number. Below is my array;

Array
(
[0] => Array
    (
        [0] => Name
        [1] => Email
        [2] => Phone Number
    )

[1] => Array
    (
        [0] => Mick
        [1] => [e-mail]
        [2] => 01234 324234
    )

[2] => Array
    (
        [0] => james
        [1] => [e-mail]
        [2] => 
    )

[3] => Array
    (
        [0] => reg
        [1] => [e-mail]
        [2] => 10293 467289
    )

)

I wish to loop through and remove these null values and combine the Email and Phone Number into Info end up with an array which resembles

Array
(
[0] => Array
    (
        [0] => Name
        [1] => Info

    )

[1] => Array
    (
        [0] => Mick
        [1] => [e-mail] + 01234 324234
    )

[2] => Array
    (
        [0] => james
        [1] => [e-mail]
    )

[3] => Array
    (
        [0] => reg
        [1] => [e-mail] + 10293 467289
    )

)

Here is my current script, I am recienving the error;

<b>Warning</b>:  array_filter() expects parameter 2 to be a valid callback, no array or string given in <b>C:\Users\Lydia\Documents\XAMPP\htdocs\CSV.php</b> on line <b>21</b><br />

every time that I loop through the changeRow() function, any help greatly appreciated

index.php

<?php
include 'CSV.php';
header('Content-type: text/plain');

$file = read_csv('Book1.csv');

$input = changeRow($file);

CSV.php .... ....

    function changeRow($rows){

    $len = count($rows);

    for($i = 0; $i < $len; $i++){

        $rows = array_filter($rows[0],0);



    }


}

Answer 1

Can use array_map() instead of foreach(). Example:

$file = read_csv('Book1.csv');
$input = array_map(function($v){
    $phone = (isset($v[2]) && $v[2]) ? ' + '. $v[2] : '';
    return array($v[0], $phone);
},$file );
if(isset($result[0][1])) $result[0][1] = 'Info';

print '<pre>';
print_r($input);
print '</pre>';