how to change type of value in an php array and sorting it..is it possible?

Question

i got problem with my code and hopefully someone able to figure it out. The main purpose is to sort array based on its value (then reindex its numerical key).

i got this sample of filename :

  $filename = array("index 198.php", "index 192.php", "index 144.php", "index 2.php",  "index 1.php", "index 100.php", "index 111.php");

  $alloutput = array(); //all of index in array

  foreach ($filename as $name) {
    preg_match('#(\d+)#', $name, $output);      // take only the numerical from file name 
    array_shift($output);                       // cleaned. the last code create duplicate numerical in $output, 
    if (is_array($output)) {
        $alloutput = array_merge($alloutput, $output);
    }
  }


//try to check the type of every value in array
foreach ($alloutput as $output) { 
    if (is_array($output)) {
        echo "array true </br>";        
    } elseif (is_int($output)) {
        echo "integer true </br>";
    } elseif (is_string($output)) {   //the numerical taken from filename always resuld "string". 
        echo "string true </br>";
    }   
}

the output of this code will be :

Array ( [0] => 198 [1] => 192 [2] => 144 [3] => 2 [4] => 1 [5] => 100 [6] => 111 )

i have test every output in array. It's all string (and not numerical), So the question is how to change this string to integer, so i can sort it from the lowest into the highest number ?

the main purpose of this code is how to output array where it had been sort from lowest to highest ?

I don't understand your code, there are undefined vars in your loops (hasil and hasilku) — Nicolò Martini
– Nicolò Martini, Commented Mar 27, 2010 at 9:54

codaddict · Accepted Answer · 2010-03-27 09:56:03Z

1

preg_match will keep the matched part in $outpu[1], so you can make use of that to convert the string to int and then add it to your alloutput array.

foreach ($filename as $name) {
    preg_match('#(\d+)#', $name, $output);
    $alloutput[] = intval($output[1]);
}

answered Mar 27, 2010 at 9:56

codaddict

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3 Comments

justjoe Over a year ago

it's you again...lol Thanks i will try to find the way to sort it ;D

justjoe Over a year ago

sorry i use the wrong code in the above code. but i understand your answer ;D

codaddict Over a year ago

@justjoe: To sort you can use the sort function. Also you need not have to convert the strings to int before you sort. The sort function takes an argument SORT_NUMERIC. Which will treat your array elements are numeric. Give it a try.

Nicolò Martini · Accepted Answer · 2010-03-27 09:48:52Z

0

Use intval

$number_string = '14';
$number = intval('14');

With intval you can specify also the basis. If the number is decimal, hower, you can also use

$number = (int) $number_string;

answered Mar 27, 2010 at 9:48

Nicolò Martini

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1 Comment

justjoe Over a year ago

i know about this. but i hope the solution given in the first foreach. so it will be more directly.sorry if it's too much

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