PHP How to Unset Member of Multidimensional Array? - php

Question

I have a three dimensional array that looks like this
Array(
[Group 1] => Array
(
[0] => Array
(
[category] => Group1
[firstname] => John
[lastname] => Johns
[image] => /mysite.etc/jj.jpg
)
[1] => Array
(
[category] => Group1
[firstname] => John
[lastname] => James
[image] => /mysite.etc/jj2.jpg
)
)
[Group 2] => Array
(
[0] => Array
(
[category] => Group2
[firstname] => John
[lastname] => Jackson
[image] => NULL
)
[1] => Array
(
[category] => Group2
[firstname] => John
[lastname] => Jimson
[image] => /mysite.etc/jj4.jpg
)
)...etc)
I'm trying to loop through the array and remove any people (i.e. the second level of the array) who do not have a value in the [image] cell.
I've tried
foreach($MyArray as $Key=>&$group){
foreach($group as &$staff){
if(!file_exists($staff['image'])){
unset($staff);
}
}
}
but this does not remove the array items with no image. The loop is correctly identifying the staff with no image as if I include a bit of code to echo them onto the page, this works. It's just not unsetting them from the $MyArray array.
Can anyone help me achieve this?

Answer 1

foreach($MyArray as $Key=>$group){
foreach($group as $k=>$staff){
if( !file_exists($staff['image'])) {
unset($MyArray[$Key][$k]);
}
}
}
//you should know the the $group and $staff is temp variables

Answer 2

foreach ($MyArray as $Key=>$group) {
foreach ($group as $k=>$staff) {
if( empty($staff['image']) || !file_exists($staff['image'])) {
unset($MyArray[$key][$k]);
}
}
}

Answer 3

The condition should be following like this.
foreach($MyArray as $Key=>&$group){
foreach($group as $staffkey=>$staff){
if( $staff['image'] == null))
{
unset($MyArray[$key][$staffkey]);
}
}
}

Answer 4

You can use array_filter for this:
With a closure: available in php 5.3
foreach($groups as &$users){
$users = array_filter($users, function ($a) { return isset($a["image"]) && file_exists($a["image"]); });
}
Without closures
function hasImage($a){ return isset($a["image"]) && file_exists($a["image"]); }
foreach($groups as &$users){
$users = array_filter($users, "hasImage");
}