How to remove empty data from an array?
var_dump($array);
array(1)
{ [0]=>
array(4)
{
[0]=> string(0) ""
[1]=> string(3) "car"
[2]=> string(4) "bike"
[3]=> string(1) " "
}
}
I add array_filter($array); nothing removed. so how to remove "" and " " or if have more empty space in the array?
$array = array_filter($array, 'trim');
[edit]
This will indeed fail on some values like '0', and non-string values.
A more thorough function is:
$array = array_filter($array, function($a){
return is_string($a) && trim($a) !== "";
});
This will only return strings that fit your request.
I think you're trying to achieve this behavior:
<?php
$foo = array(
array(
'foo',
' ',
'bar',
0,
false,
),
);
function array_clean(array $haystack)
{
foreach ($haystack as $key => $value) {
if (is_array($value)) {
$haystack[$key] = array_clean($value);
} elseif (is_string($value)) {
$value = trim($value);
}
if (!$value) {
unset($haystack[$key]);
}
}
return $haystack;
}
print_r(array_clean($foo));
The script will output:
Array
(
[0] => Array
(
[0] => foo
[2] => bar
)
)
Right?
Create a callback function which trims whitespace from the input element and return TRUE if the trimmed element isn't empty:
$array = array_filter($array, function($x) {
$x = trim($x);
return !empty($x);
});
// Example:
$array = array(1,2,"",3," ",5);
print_r($array);
Array
(
[0] => 1
[1] => 2
[3] => 3
[5] => 5
)
According to the doc of array_filter() :
$entry = array(
0 => 'foo',
1 => false,
2 => -1,
3 => null,
4 => ''
);
print_r( array_filter( $entry ) ); //Array ( [0] => foo [2] => -1 )
// removes all NULL, FALSE and Empty Strings but leaves 0 (zero) values
$result = array_filter( $array, 'strlen' );
