Using 0 padded integers as index for an array:
	- does not work for 0 and 8
	- scrambles the order of the elements

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$a[00] = "string0";
$a[01] = "string1";
$a[02] = "string2";
$a[03] = "string3";
$a[04] = "string4";
$a[05] = "string5";
$a[06] = "string6";
$a[07] = "string7";
$a[08] = "string8";
$a[09] = "string9";

echo implode(";", $a);
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This yields:

string9;string1;string2;string3;string4;string5;string6;string7