How to access array values outside for loop in PHP

Question

I'm working with array in PHP. My question is how to access PHP array values outside the for loop.

Here is the code.

<?php
$a = array("1","2");
for($i=0;$i<count($a);$i++){
#some core functionality DB related.
$val = $row['values'];
$b = explode(',',$val);
}
print_r($b);

$fin = array_combine($a,$b);
print_r($fin);
?>

I want to combine both the array, but I'm not getting array b. How to access the array values outside for loop?

Expected output:

Array ( [0] => 7 [1] => 6 ) // b array
Array ( [1] => 7 [2] => 6 ) // fin array

you have to combine array in side for loop because $b is taking last value fetched from database so i would suggest you combine value in for loop — Amit Gaud
– Amit Gaud, Commented May 10, 2017 at 6:57
when i try that array $a is getting looped twice. so its not working. — Vikky
– Vikky, Commented May 10, 2017 at 8:41
how you assigning all values because you are not concatenating the $val — Amit Gaud
– Amit Gaud, Commented May 10, 2017 at 8:54

Nandan Bhat · Accepted Answer · 2017-05-11 04:56:06Z

1

Try appending all the results to the original array. Something like this.

<?php
$a = array("1","2");

for($i=0;$i<count($a);$i++){
#some core functionality DB related.
$val = $row['values'];
$temp_array = explode(',',$val);
    for($j=0;$j<sizeof($temp_array);$j++){
        array_push($a,$temp_array[$j]);
    }
}
print_r($a);

?>

edited May 11, 2017 at 4:56

answered May 10, 2017 at 6:52

Nandan Bhat

1,5632 gold badges10 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Prashanth Kumar B Over a year ago

instead of directly assigning the explode value you can, use array_push to keep all the values in $b, you can edit the code to add the below value, array_push($b, explode(',',$val)); instead of $b = explode(',',$val);

Vikky Over a year ago

Im getting the last value in the array @nandan. when i try your approach im getting blank page Aoxi

Vikky Over a year ago

@nandan im using for loop for DB only as im getting values from a table. and i'm trying to assign that value to $a array as key=> value pair

mickmackusa · Accepted Answer · 2017-05-10 10:10:18Z

0

I keep staring at the original process and it seems unnecessarily convoluted. Does this not do what you wish:

$a=["1","2"];
foreach($a as $k=>$v){
    // I don't know if you are using $k or $v in your DB actions
    // On 1st iteration, $k=0 & $v="1"; on 2nd: $k=1 & $v="2"
    $fin[$v]=explode(',',$row['values']);
}
var_export($fin);

If this is wrong please let me know how it is wrong so I can better understand the question.

answered May 10, 2017 at 10:10

mickmackusa♦

49.2k13 gold badges98 silver badges165 bronze badges

2 Comments

mickmackusa Over a year ago

@Vikky great. I just want to mention that if this was my project, I'd probably look into optimizing my process so that I only need to make 1 call to the database, rather than a call for each value in $a. ...I'll leave you to think about that possibility.

Vikky Over a year ago

yes absolutely @mick. for simple understanding i have mention $a array, but in real time i get this from db and convert it to array. thank you for your help

Amit Gaud · Accepted Answer · 2017-05-10 12:52:04Z

0

If I'm not wrong you are looking for this code with above what I have discussed with you

<?php
$a = array("1","2");
$b = array();
for($i=0;$i<count($a);$i++){
#some core functionality DB related.
$b[] = $row['values'];
}
print_r($b);

$fin = array_combine($a,$b);
print_r($fin);

?>

edited May 10, 2017 at 12:52

answered May 10, 2017 at 9:54

Amit Gaud

7786 silver badges15 bronze badges

2 Comments

Vikky Over a year ago

yes but only thing is we have to declare $b = array(); before for loop to access the array. rest is same thanks @amit

Amit Gaud Over a year ago

@Vikky I have changed

Collectives™ on Stack Overflow

How to access array values outside for loop in PHP

3 Answers 3

3 Comments

2 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

3 Comments

2 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related