I want to change the indexing of array for example. I have an array
$a = array("a","e","i","o","u");
echo $a[0]; //output a
It means this array has index (0,1,2,3,4)
Now I want to start my array from index 100 instead 0
Means array with index (100,200,300,400,500)
If you want to declare an array that way you should do:
$array = array(100 => 'a', 200 => 'b', 300 => 'c', 400 => 'd', 500 => 'e');
Note that if you add a new element to the $array in the shorter way ($array[] = 'f') the key assigned will be 501.
If you want to convert regular array indexes to hundreds-based ones you can do this:
$temp = array();
foreach ($array as $key => $value) {
$temp[(($key + 1) * 100)] = $value;
}
$array = $temp;
But perhaps you don't really need to convert no array and instead access your current one this way:
$i = $hundredBasedIndex / 100 - 1;
echo $array[$i];
// or directly
echo $array[($hundredBasedIndex / 100 - 1)];
Other solution:
$a = array_combine(array(100, 200, 300, 400, 500), $a);
You could simply define a starting index and iterate over the array swapping the indexes. Something like this -
$oldArray = array("a","e","i","o","u");
$newArray = array();
$startIndex = 100;
foreach($oldArray AS $key => $value){
$newArray[$startIndex] = $value;
startIndex += 100;
}
just make an associative array with keys as indexes you want. for example :
$myArray = array(100=>"a",200=>"e",300=>"i",400=>"o",500=>"u");
then you call the values like:
echo $myArray[100] ;
note: do not put '100'=>"a" instead of 100=>"a"
$key = array(100, 200, 300, 400, 500);
$b = array_combine($key, $a);
Simply change your array Like this:
$a = array(100 => "a", 200 => "e", 300 => "i", 400 => "o", 500 => "u");
Just create the array that way.
$myarray = array(
100 => 'a',
200 => 'b',
);
If you already have an array with that order, and want to multiply the keys by 100, you can do so in a loop (there are other ways, but...):
$a = array('a', 'b', 'c', 'd', 'e');
$newarray = array();
foreach($a as $key => $value)
$newarray[100*($key+1)] = $value;
