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How can I store the contents of an array in a file?

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Nov 30.2005

Hi,
How can I store the contents of a multidimensional array in a file, and then, at some other time, read the stored values back into the original array?

It doesn’t matter to me whether I store the whole array or just the values or whatever, as long as it works.

I usually get good help in this forum, so thanks in advance for your help, guys.

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PHP

6 Comments(s) ↴

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@NogDogNov 30.2005 — Hmmmm....I'm thinking this [b]might[/b] work, but I've not tested it:
[code=php]
# save array:
$saveData = var_export($theArray, TRUE);
$handle = fopen("the_file.txt", 'w') or die("can't open file");
fwrite($handle, $saveData);
fclose($handle);
# read array:
$saveData = file_get_contents("the_file.txt") or die("can't read file");
eval('$theArray = ' . $saveData . ';');
[/code]
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@BluesManauthorNov 30.2005 — Thanks, NogDog,

I'll try it out when I get home from work (it's 16:25 here in Oslo, Norway and I'm about to go home ? ?.)
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@bokehNov 30.2005 — Nogdog's method works fine. Here's another method. The two methods vary slightly in the way the array looks when stored in the text file.[code=php]#save array "$the_array"
$array_file = fopen("the_file.txt", 'w') or die("can't open file");
foreach($the_array as $k => $v) fwrite($array_file, "'$k' => '$v', n");
fclose($array_file);

# read array:
$the_array = array(file_get_contents("the_file.txt")) or die("can't read file");[/code]
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@BluesManauthorNov 30.2005 — Hi,

I tried NogDog's suggestion, and it worked nicely - just the way I hoped it would - so I haven't looked into bokeh's way (yet).

Thanks a lot, guys. As usual you provide great help!
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@SpectreReturnsDec 01.2005 — I would totally [b]serialize()[/b] it up.
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@bokehDec 01.2005 — I would totally [b]serialize()[/b] it up.[/QUOTE]What, like this?[code=php]#save array "$TheArray"
$array_file = fopen("the_file.php", 'w');
fwrite($array_file, serialize($TheArray));
fclose($array_file);

# read array:
$TheArray = unserialize(file_get_contents("the_file.php"));[/code]

Also I have thought of a twist to Nogdog's method:[code=php]#save array "$TheArray"
$saveData = var_export($TheArray, TRUE);
$handle = fopen("the_file.php", 'w');
fwrite($handle, '<?php'."n".'$TheArray = '.$saveData.';'."n".'?>');
fclose($handle);

# read array
require("the_file.php");[/code]
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