$arrays = array (
'child1_167'=>'1st',
'child1_167'=>'2nd',
'child1_165'=>'2nd',
'child2_165'=>'1st',
'child3_164'=>'2nd',
'child1_164'=>''
);
$classes = array();
foreach ($arrays as $key=>$value) {
if($value != '') {
$exp= explode('_', $key);
$classes[$exp[0]] = $exp[1];
}
}
print_r($classes);
currently it is returning like this:
Array ( [child1] => 165 [child2] => 165 [child3] => 164 )
but i want it to return all the keys and value if value is not blank.
I am actually getting the data from form. and my actual code is foreach ($_post as $key=>$value )
<td>
<select name="child1_<?php echo child_id(); ?>">
<option></option>
<option>1st</option>
<option>2nd</option>
</select>
</td>
<td>
<select name="child2_<?php echo child_id(); ?>">
<option></option>
<option>1st</option>
<option>2nd</option>
</select>
</td>
<td>
<select name="child3_<?php echo child_id(); ?>">
<option></option>
<option>1st</option>
<option>2nd</option>
</select>
</td>
and here is the form post data.
Array ( [child1_167] => 1st [child2_167] => 2nd [child3_167] => [child1_165] => [child2_165] => 1st [child3_165] => 2nd [child1_164] => 2nd [child2_164] => [child3_164] => 1st ) Array ( [167] => 2nd [165] => 2nd [164] => 1st )
Working with the array you provided in the comments her as an example that has all the values, storing them as a two-dimensional associative array:
$arrays = Array (
'child1_167' => '1st' ,
'child2_167' => '2nd' ,
'child3_167' => '',
'child1_165' => '',
'child2_165' => '1st' ,
'child3_165' => '2nd' ,
'child1_164' => '2nd' ,
'child2_164' => '',
'child3_164' => '1st' ,
) ;
$classes = array();
foreach ($arrays as $key=>$value) {
if($value != '') {
$exp= explode('_', $key);
$child_number=$exp[0];
$child_id=$exp[1];
$child_order=$value;
$classes[$child_number][$child_order] = $exp[1];
}
}
print_r($classes);
And this is the output:
Array
(
[child1] => Array
(
[1st] => 167
[2nd] => 164
)
[child2] => Array
(
[2nd] => 167
[1st] => 165
)
[child3] => Array
(
[2nd] => 165
[1st] => 164
)
)
The problem is that array keys must be unique, but you're setting the same key child1 with three different values (167, 167 and 165) so you're just overwriting the same entry each time.
What you could do is:
$classes = array();
foreach ($arrays as $key=>$value) {
if($value != '') {
$exp= explode('_', $key);
$classes[$exp[0]][] = $exp[1];
}
}
which will generate a multi-dimensional array
$arrays = array (
'child1_167'=>'1st',
'child1_167'=>'2nd',
'child1_165'=>'2nd',
'child2_165'=>'1st',
'child3_164'=>'2nd',
'child1_164'=>''
);
The key are uniques if you print $arrays on the begin you will find the answer:
echo "<pre>";
print_r($arrays);
echo "</pre>";