i have array something like this
$arr =
['0' =>
['0' => 'zero',
'1' => 'test',
'2' =>'testphp',
'test'=>'zero',
'test1'=>'test',
'test2'=>'testphp'],
'1' =>
['0' => 'z',
'1' => 'x',
'2' =>'c',
'test'=>'z',
'test1'=>'x',
'test2'=>'c']
];
and 0,1,2 is this same as test,test1,test2. I need remove keys where is string like test,test1,test2. I know the way
foreach($arr as $a){
unset($arr['test']);
unset($arr['test1']);
unset($arr['test2']);
}
but it is possible find keys without specifying the exact name, because i want only number keys.
A solution would be:
Assuming you know it will only have 2 layers.
$arr =
['0' =>
['0' => 'zero',
'1' => 'test',
'2' =>'testphp',
'test'=>'zero',
'test1'=>'test',
'test2'=>'testphp'],
'1' =>
['0' => 'z',
'1' => 'x',
'2' =>'c',
'test'=>'z',
'test1'=>'x',
'test2'=>'c']
];
foreach($arr as $parentKey=>$arrayItem){
foreach($arrayItem as $key=>$subArrayItem){
if(!is_int($key)){
unset($arr[$parentKey][$key]);
}
}
}
var_dump($arr);
Why is it though that such arrays have been generated?
edit: after reading Valdorous answer realized it is multidimensional array. the following should handle recursively a multi-dimensional array.
call the function (see below)
remove_non_numeric_keys($arr)
function remove_non_numeric_keys($arr)
{
foreach($arr as $key=>$val)
{
if(!is_numeric($key)) // if not numeric unset it regardless if it is an array or not
{
unset($arr[$key]);
}else{
if(is_array($val) // if it is an array recursively call the function to check the values in it
{
remove_non_numeric_keys($val);
}
}
}
}
This should remove only non-numeric keys. http://php.net/manual/en/function.is-numeric.php
Hope it helps
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