ereg problem

[acrid]

Can someone point out what I'm doing wrong here? The first doesn't echo anything:

1.
$sentence="this 900 is my sentence";
$ifNum=ereg("[0-9]*",$sentence,$workingNum);
echo $workingNum[0];

2.
$sentence="900 this is my sentence";
$ifNum=ereg("[0-9]*",$sentence,$workingNum);
echo $workingNum[0];

The second does. Why does it only work with the number at the beginning of the sentence?

[Weedpacket]

It's because the pattern [0-9]* matches strings that consist of zero or more instances of the characters 0 to 9 inclusive. The string

""

qualifies as such a string. And that is exactly the string that appears at the very start of the $sentence (before the "t"). So ereg finds "" and returns it.

If you really do want to find digits, use + instead of *.