PHP array concatenation and reorganization

The current code is like this
array(6) {
[0] => string(5) "58,86"
[1] => string(5) "68,78"
[2] = > string(5) "65,78"
[3] => string(5) "60,82"

But the content required for data processing should be
array(1){

<code>[0] => 58,68,65,60
[1] => 86,78,78,82</code>

}

Please tell me how to process the data

After thinking about it, the idea is to traverse first, then split the values ​​and then splice them together. However, during the final assembly, there is an empty key. I don’t know where it comes from.
array(6) {
[0] => string(5 ) "58,86"
[1] => string(5) "68,78"
[2] => string(5) "65,78"
[3] => string(5) " 60,82"
[4] => string(3) "094"
[5] => string(2) "40"
}、

foreach($lsj['data'] as $key=>$val){

<code>    $a[''] = $a[$key] = explode(',',$val);
   }
   </code>

we get
array(7) {
[0] => array(2) {

<code>[0] => string(2) "58"
[1] => string(2) "86"</code>

}
[""] => array(1) {

<code>[0] => string(2) "40"</code>

}
[1] => array(2) {

<code>[0] => string(2) "68"
[1] => string(2) "78"</code>

}
[2] => array(2) {

<code>[0] => string(2) "65"
[1] => string(2) "78"</code>

}
[3] => array(2) {

<code>[0] => string(2) "60"
[1] => string(2) "82"</code>

}
[4] => array(1) {

<code>[0] => string(3) "094"</code>

}
[5] => array(1) {

<code>[0] => string(2) "40"</code>

}
}
Then assemble the same key into a new array. Because my PHP version is 5.4 and I cannot use array_column, I wrote a public method i_array_column()

$b['data1'] = i_array_column($a,'0');
$b['data2'] = i_array_column($a,'1');

Get 1 array
array(2) {
["data1"] => array(7) {

<code>[0] => string(2) "58"
[""] => string(2) "40"
[1] => string(2) "68"
[2] => string(2) "65"
[3] => string(2) "60"
[4] => string(3) "094"
[5] => string(2) "40"</code>

}
["data2"] => array(7) {

<code>[0] => string(2) "86"
[""] => NULL
[1] => string(2) "78"
[2] => string(2) "78"
[3] => string(2) "82"
[4] => NULL
[5] => NULL</code>

}
}
Because highcharts requires json format, convert it to json format
dump(json_encode($b));,
The result after accurate conversion is
string(146) "{"data1":{"0":"58" ,"":"40","1":"68","2":"65","3":"60","4":"094","5":"40"}," data2":{"0":"86","":null,"1":"78","2":"78","3":"82","4":null,"5" :null}}"

I just don’t know why there is an empty array

Reply content:

The current code is like this
array(6) {
[0] => string(5) "58,86"
[1] => string(5) "68,78"
[2] = > string(5) "65,78"
[3] => string(5) "60,82"

But the content required for data processing should be
array(1){

<code>[0] => 58,68,65,60
[1] => 86,78,78,82</code>

}

Please tell me how to process the data

After thinking about it, the idea is to traverse first, then split the values ​​and then splice them together. However, during the final assembly, there is an empty key. I don’t know where it comes from.
array(6) {
[0] => string(5 ) "58,86"
[1] => string(5) "68,78"
[2] => string(5) "65,78"
[3] => string(5) " 60,82"
[4] => string(3) "094"
[5] => string(2) "40"
}、

foreach($lsj['data'] as $key=>$val){

<code>    $a[''] = $a[$key] = explode(',',$val);
   }
   </code>

we get
array(7) {
[0] => array(2) {

<code>[0] => string(2) "58"
[1] => string(2) "86"</code>

}
[""] => array(1) {

<code>[0] => string(2) "40"</code>

}
[1] => array(2) {

<code>[0] => string(2) "68"
[1] => string(2) "78"</code>

}
[2] => array(2) {

<code>[0] => string(2) "65"
[1] => string(2) "78"</code>

}
[3] => array(2) {

<code>[0] => string(2) "60"
[1] => string(2) "82"</code>

}
[4] => array(1) {

<code>[0] => string(3) "094"</code>

}
[5] => array(1) {

<code>[0] => string(2) "40"</code>

}
}
Then assemble the same key into a new array. Because my PHP version is 5.4 and I cannot use array_column, I wrote a public method i_array_column()

$b['data1'] = i_array_column($a,'0');
$b['data2'] = i_array_column($a,'1');

Get 1 array
array(2) {
["data1"] => array(7) {

<code>[0] => string(2) "58"
[""] => string(2) "40"
[1] => string(2) "68"
[2] => string(2) "65"
[3] => string(2) "60"
[4] => string(3) "094"
[5] => string(2) "40"</code>

}
["data2"] => array(7) {

<code>[0] => string(2) "86"
[""] => NULL
[1] => string(2) "78"
[2] => string(2) "78"
[3] => string(2) "82"
[4] => NULL
[5] => NULL</code>

}
}
Because highcharts requires json format, convert it to json format
dump(json_encode($b));,
The result after accurate conversion is
string(146) "{"data1":{"0":"58" ,"":"40","1":"68","2":"65","3":"60","4":"094","5":"40"}," data2":{"0":"86","":null,"1":"78","2":"78","3":"82","4":null,"5" :null}}"

I just don’t know why there is an empty array

<code class="php"><?php 
$arr = ["58,86,1,18",
"68,78,2,17",
"65,78,3,17",
"60,82,4,19",
"4,5,6,18"];


array_walk($arr, function(&$item) {
    $item = explode(',', $item);
});

$new_arr = [];
$length = count($arr);
for ($i = 0; $i < $length; $i++) {
    $length1 = count($arr[$i]);
    for ($j = 0; $j < $length1; $j++) {
        $new_arr[$j][$i] = $arr[$i][$j];
    }
}

array_walk($new_arr, function(&$item) {
    $item = join(',', $item);
});

print_r($new_arr);</code>

Matrix transpose, the above method can be extended to multi-dimensional matrices

Write one that only handles your situation. After analysis, your situation is to split the strings in the array

<code>    $arr = array("58,86","68,78","65,78","60,82");
    foreach($arr as $key => $value){
        $tmp = explode(',',$value);
        $a[] = $tmp[0];
        $b[] = $tmp[1];
    }
    $c = array(
        implode(',',$a),implode(',',$b)
    );
    print_r($c);</code>