CODEWITHSUNDEEP
php
prosborne
prosborne

Reputation: 61

php: creating variables from array

I have a multi-part array that I want to grab a piece of and create a variable for it. Below is a sample of the array:

array(17) { 
  [0]=> array(2) { 
      [0]=> int(1325003844) [1]=> array(2) { 
          [0]=> int(31) [1]=> string(19) "ONBOARD TEMPERATURE" } 
      }

There are 32 different parts like this where the value I want (like the text in quotes above) can be found at $foo[x][1] with x being a value from 0-31. So I am wondering if I can use foreach or for to create a loop that will go through each iteration of the variable and pull that text and add it to a variable.

So the current code I have is:

if(isset($result[1][10])) { // If index 10 of $result exists
    $json_a =  $result[1][10];
    var_dump ($json_a);

To get the value I want in a single variable, I need to assing $foo_01 to $json_a[0][1] right now, and then do that 32 times. ($json_a[1][1], $json_a[2][1], $json_a[3][1], etc.) I would rather just have one statement taht assigns them all at once.

Let me know if you need additional information. Thanks again!

Upvotes: 2

Views: 966

Answers (2)

Dutchie432
Dutchie432

Reputation: 29170

Of course you can.

//Initialize an array variable to hold the names
$names= array();

//Creates an array of 32 strings (the names)
foreach ($items as $item){
    $names[]=$item[1]; 
}
//If you want to display all of the name at once, you can easily
//Implode the array to echo all of the items with a linebreak in between
echo implode('<br />', $names); 

//or you can cycle through the results and do something for each name
//although this can be done in the original loop.
foreach ($names as $name){
    echo $name.'<br />';
}

On a side note, the array architecture you show seems a little weird to me. Knowing not much at all about what you're trying to do, do you think a format like this would be better?

array(31) { 
    [0]=> array(2) { 
        [id]=> int(1325003844),
        [name]=> "ONBOARD TEMPERATURE"
    }, 
    [1]=> array(2) { 
        [id]=> int(1325003845), 
        [name]=> "NAME 2"
    }, 
    etc...
}

This way you already have your finished array, ready to loop through?

UPDATE

foreach($results as $result){
    if(isset($result[1][10])) { // If index 10 of $result exists
        $foo[] =  $result[1][10];
    }
}

//Then you can access each one when needed
echo $foo[1];

Upvotes: 3

Stephen Walcher
Stephen Walcher

Reputation: 2575

If you use two consecutive '$', PHP will actually use the value of a variable to create a new variable of that name. Example:

$var1 = 'variable2'
$$var1 = 'hello';

echo $var1;
echo $variable2;

Will output:

variable2
hello

From your above examples, though, your naming conventions dont seem to support that (there's a space in "ONBOARD TEMPERATURE") so, you might be better using an array with associative id keys. Example:

$values[$foo[x][1]] = $foo[x][0];

Would get you a variable of $values['ONBOARD TEMPERATURE'] that would output 31.

Upvotes: 0

Related Questions