How to read PHP arrays?

Question

I'm doing a quick PHP project that takes information from another file and reads it and gathers the information. The websites stores information like this:

Filename: .ipn

 Array
(
    [mc_gross] => 10.00
    [ipn_track_id] => 731ea17d
)
Array
(
    [mc_gross] => 10.00
    [ipn_track_id] => 523fd7886
)
Array
(
    [mc_gross] => 10.00
    [ipn_track_id] => 523fd7886
)

How would I create a PHP script that takes the .ipn file and sums up the overall [mc_gross], which in this case would be 30.00?

You should save the array as JSON. json_encode($array); and json_decode($file);. — Sam
– Sam, Commented Feb 2, 2014 at 22:52
What generates the .ipn? That's a very unconventional format and not very mark-up friendly. You could parse it, but you'd be better off working with XML, JSON, or YML — sjagr
– sjagr, Commented Feb 2, 2014 at 22:52
You can use a regular expression for this - just match on the literal [mc_gross] => followed by any number of [0-9.]. Give that a go, and let me know how you get on! — halfer
– halfer, Commented Feb 2, 2014 at 22:52

Kamehameha · Accepted Answer · 2014-02-02 23:11:48Z

2

This should work -

<?php
        $input = file_get_contents("filename.ext");
        $regexp = "/\[mc_gross\][ ]*=>[ ]*([0-9]+(?:\.[0-9]+)?)/";
        $sum = 0;
        if(preg_match_all($regexp, $input, $matches, PREG_SET_ORDER)){
            foreach($matches as $match) {
                $sum += $match[1];
            }
            unset($match);
        }
        echo "Sum ".$sum;

/*
    var_dumping the matches - 
    array
      0 => 
        array
          0 => string '[mc_gross] => 10.00' (length=19)
          1 => string '10.00' (length=5)
      1 => 
        array
          0 => string '[mc_gross] => 10.00' (length=19)
          1 => string '10.00' (length=5)
      2 => 
        array
          0 => string '[mc_gross] => 10.00' (length=19)
          1 => string '10.00' (length=5)
*/

?>

edited Feb 2, 2014 at 23:11

answered Feb 2, 2014 at 22:59

Kamehameha

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7 Comments

Gretar Agnarsson Over a year ago

What would I type inside the regexp if I wanted to print out an array of string that would be named [mc_name] everytime.

Kamehameha Over a year ago

mc_name instead of mc_gross?? just replace mc_gross to mc_name Like this "/[mc_name][ ]*=>[ ]*([0-9]+(?:\.[0-9]+)?)/" .

Kamehameha Over a year ago

Additionally, if you have [mc_gross] and [mc_name] occuring in different arrays and want to find sum of both the entries, you can use this "/[(?:(?:mc_gross)|(?:mc_name))][ ]*=>[ ]*([0-9]+(?:\.[0-9]+)?)/"

Gretar Agnarsson Over a year ago

The problem is that your code seems to only take numbers, not strings.

Kamehameha Over a year ago

Oh ok you did not specify that. I took the format to be concrete. Use this for names - /[mc_name][ ]*=>[ ]*([a-zA-Z]+)/

|

Community · Accepted Answer · 2023-11-21 15:10:29Z

0

First, save the array to the files using serialize.

$string = serialize($array);
file_put_contents('myfile.ipn',serialize($string));

Then, read the file using unserialize and file_get_contents.

$content = file_get_contents('myfile.ipn');
$array = unserialize($content);

Hope this helps!

edited Nov 21, 2023 at 15:10

CommunityBot

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answered Feb 2, 2014 at 22:55

dev7

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1 Comment

thpl Over a year ago

What if OP has no influence on how the file that he wants to read is generated?

voodoo417 · Accepted Answer · 2014-02-03 00:09:10Z

0

Do it:

$lines = array_chunk(file('items.ipn'),5);
$sum = 0;
foreach($lines as $line){
  $sum += floatval(end(explode('=>',$line[2])));
}
print $sum;
// 30

edited Feb 3, 2014 at 0:09

answered Feb 2, 2014 at 23:29

voodoo417

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