Comparing arrays, point me in the right direction please

[TroyVE]

So what im trying to do is compare bank transactions to orders in my database and if they match change the order status to confirmed.The transactions come in a xml format\[code\]$transaction->user-number //this is the social security number of the one who made the transaction$transaction->amount //this is the amount transfered\[/code\]I need to compare the user-number to the user-numbers associated with orders in my database.I could do that by making two arrays with those numbers and use \[code\]array_intersect\[/code\] to find the numbers that are present in both the database and in the transactions xml.Now i would have the user-numbers of the ones who have made a transaction but I still need to see if they transfered the correct amount.I will be able to finish this but I somehow feel that there is a simpler solution by using the user-number as the index in the array and the amount as the value and create two arrays like that and compare them.Can anyone help me here before I write some complicated, slow and messy code.Thanks