PHP how do i write a multi dimmensional array into file

Question

I am trying to use files to hold an array for checkers

this is the array

$board = array(
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0),
         array(0,0,0,0,0,0,0,0,0)
   );

while also giving the values so that i can set the beginning of the board with the pieces placed in a predefined positions to start the game in then have them user input which location they want to move the pieces into

I already have this while loop

      $row = 0;
    print "<form>";
    print "<table border = 1>";
    while ($row < 8){ // Counts to 8. (from 0...7 = 8 times. 0 ... 8 = 9 times)
       print "<tr>";
       $row++;
       $col = 0; // reset column to 0 each time printing one row.

       while ($col < 8){
        print "<td>";
        if($Board[$row][$col] == 0)
        {
            $value=$row.$col;
            print "<input type=\"checkbox\" name=\"box[]\" value=\"$value\">";
            // Add \ before " otherwise it will treat as the end of the quote.

        }
        print "</td>";
        $col++;

       }

       print "</tr>";

    }
    print "</table>";
    print "</form>";

}

what I am trying to find out is what php functions do i need to make this array store in the file then display board into html tables with 8x8 rows and columns. — hgbso
– hgbso, Commented Nov 4, 2010 at 21:08
I just want to be pointed in the right direction and I don't expect anyone to this for me — hgbso
– hgbso, Commented Nov 4, 2010 at 21:14

NikiC · Accepted Answer · 2010-11-04 21:33:37Z

10

file_put_contents($f, serialize($board));

this will serialize your multidimensional array in a file.

To read it back, use

$board = unserialize(file_get_contents($f));

edited Nov 4, 2010 at 21:33

NikiC

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answered Nov 4, 2010 at 21:10

Ass3mbler

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Comments

seriyPS · Accepted Answer · 2010-11-04 21:17:17Z

4

2 variants: using serialize

#dump:
file_put_contents('file_name', serialize($board));
#restore:
$board=unserialize(file_get_contents('file_name'));

using JSON:

#dump:
file_put_contents('file_name', json_encode($board));
#restore:
$board=json_decode(file_get_contents('file_name'));

JSON variant works faster, but can dump only simple structures (strings, arrays, numbers). serialize can dump objects too but works slower and generate more output

answered Nov 4, 2010 at 21:17

seriyPS

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7 Comments

BoltClock Over a year ago

JSON = JavaScript Object Notation, so why would it not be able to dump objects?

Wrikken Over a year ago

@BoltClock: not of specific classes you get back after decoding, only stdClass, which may not be what you want...

hgbso Over a year ago

@Wrikken - "not of specific classes you get back after decoding, only stdClass, which may not be what you want" what did you mean by this comment towards @BoltClock about JSON

Wrikken Over a year ago

That:class Foo{}; echo get_class(json_decode(json_encode(new Foo()))); results in stdClass and not in Foo (in other words: the type of object is not preserved in JSON (it's just not in the JSON spec).

hgbso Over a year ago

so using JSON on this example isn't good or is it I have never used it before

|

zerodin · Accepted Answer · 2010-11-04 21:12:49Z

1

why don't you serialize the array and store it as a string into the file. to get the array back, you can read the string from the file and un-serialize it. have a read here here

answered Nov 4, 2010 at 21:12

zerodin

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Comments

nikunj gandhi · Accepted Answer · 2013-07-11 03:12:26Z

0

Why serialize and store ? Even you can directly print array to file

ob_start();

print_r( $yourArry);

$output = ob_get_clean();

file_put_contents( 'yourfilename.txt',$output );

See example here http://www.my-php-scripts.net/index.php/Array-Scripts/php-write-multidimensional-array-into-file-advanced-php.html

answered Jul 11, 2013 at 3:12

nikunj gandhi

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