Best way to generate transaction id for a point of sale appl

[mukeshprasad4u]

Hi ,
I am new to the php.I am building an php pos application to learn php by doing.
I want to generate a unique transaction id whenever any transactions like purchase order,purchase return,sales or sales return etc.
But confused how to accomplise this.Is uniquid feature of php is sufficeint for this.
I wanted to generate it in format like PO20130220001 ie. PO+date+3 or 4 digit number.

Any kind of suggestion is of great help to me.

[simplypixie]

Code: Select all

$date = date('Ymd');
$numbers = '0123456789';
for ($i=0; $i<$4; $i++) {
      $rand_num.=$numbers{rand(0,strlen($numbers)-1)};
   }
$transaction_id = 'PO'.$date.''.$rand_number;