2

I want create a nested array from a config file dynamically. My config file structure is like this:

parameter1 value1;
parameter2 value2;
parameter3 value3;

block1{
    parameter1-1 value1-1;
    parameter1-2 value1-2;

    block1-1{
        parameter1-1-1 value1-1-1;
        parameter1-1-2 value1-1-2;

        block1-1-1{
            parameter1-1-1-1 value1-1-1-1;
            parameter1-1-1-2 value1-1-1-2;
        }
        block1-1-2{
            parameter1-1-2-1 value1-1-2-1;
            parameter1-1-2-2 value1-1-2-2;
        }
    }
    block1-2{
        parameter1-2-1 value1-2-1;
        parameter1-2-2 value1-2-2;

        block1-2-1{
            parameter1-2-1-1 value1-2-1-1;
            parameter1-2-1-2 value1-2-1-2;
        }
        block1-2-2{
            parameter1-2-2-1 value1-2-2-1;
            parameter1-2-2-2 value1-2-2-2;
        }
    }
}

block2{
    parameter2-1 value2-1;
    parameter2-2 value2-2;

    block2-1{
        parameter2-1-1 value2-1-1;
        parameter2-1-2 value2-1-2;

        block2-1-1{
            parameter2-1-1-1 value2-1-1-1;
            parameter2-1-1-2 value2-1-1-2;
        }
        block2-1-2{
            parameter2-1-2-1 value2-1-2-1;
            parameter2-1-2-2 value2-1-2-2;
        }
    }
    block2-2{
    parameter2-2-1 value2-2-1;
    parameter2-2-2 value2-2-2;

    block2-2-1{
        parameter2-2-1-1 value2-2-1-1;
        parameter2-2-1-2 value2-2-1-2;
    }
    block2-2-2{
        parameter2-2-2-1 value2-2-2-1;
        parameter2-2-2-2 value2-2-2-2;
        }
    }
}

and i want this array dynamically in php:

$blocks = array(
    $parameter => $value,
    $parameter => $value,
    $block => array(
        $parameter => $value,
        $parameter => $value,
        $block => array(
            $parameter => $value,
            $parameter => $value,
            $block => array(
                $parameter => $value,
                $parameter => $value
                ...
           )
        )
    )
);

How to create dynamically nested array in PHP

Thanks.

UPDATE:

  • I read file line by line to an array and i want create above structure for edit it and write it again to config file.

  • I means from "dynamic" is creating array inside "for" or other similar things.

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2 Answers 2

Reset to default
3

Try this... (change "conf.txt" to "your conf file name")

<?php
$file = fopen("conf.txt","r");
$array = array();
$a = createArray($file, $array);
fclose($file);

print("<pre>".print_r($a,true)."</pre>");

function createArray($file, $array){
  while(! feof($file)){
    $line = fgets($file);
    $line = trim($line);
    if ($line == ""){
        continue;
    }
    if (strpos($line,'{') !== false){
        $line = trim(str_replace('{','',$line));
        $array[$line] = array();
        $array[$line]  = createArray($file, $array[$line]);
    } else if (strpos($line,'}') !== false) {
        return $array;
    } else {
        $line = str_replace(';','',$line);
        $key  = strtok($line, ' ');
        $value = strtok(' ');
        $array[$key] = $value;
    }
  }
  return $array;
}
?>
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2 Comments

Can you give me some reference for learning recursive functions? thank you.
you are Well come :).. Read chapter 4 (Divide-and-Conquer) of the book "Introduction to Algorithms". I found it online to download but I'm not sure if it's legal (ldc.usb.ve/~xiomara/ci2525/ALG_3rd.pdf). Also you may google about "Divide and conquer" and "recursive functions".
-1

Creating array dynamically:

in all PHP versions:

$foo = array();

in PHP 5.4+ (aka "short syntax"):

$foo = [];

Creating nested array dynamically:

$foo = [];
$foo['bar'] = [];
$foo['bar']['zoo'] = [];

or

$foo = [];
$bar = ['zoo' => []];
$foo['bar'] = $bar;

And finally call

print_r($foo);

to see what you got created. Both cases are equal so you will see:

Array
(
    [bar] => Array
        (
            [zoo] => Array
                (
                )
        )
}

Please see docs on array: http://php.net/manua/en/language.types.array.php

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7 Comments

thank you. Is this dynamic? i want it inside "foreach" or similar things.
Dynamic means during code execution. It does not matter when you add element to your array in foreach, for, do or just as in my examples. At the end you got array with childs added to it dynamically, depending on your code execution
how to yo can create nested arrays inside "for"? i want nest it up to 100 time!
It depends on what nesting you need? 100 elements nest into each other (what's the point?). Anyway, you can always add new item to array like that: $a['foo']['bar']['zzz']['ttt'] = array('here'); to get deep nesting.
Thank for your answer, i don't follow specific point. only i want know is it possible?! or must be nest array one by one in my code? any way i thank you for your time. :D
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