If by "today" you mean "in the last 24 hours", try this: 
if (1 > -M $filename) {
    # Your code here
}

[download]

-----
Be bloody, bold, and resolute; laugh to scorn
The power of man...

In reply to Re: How do I determine if a file was modified today? by ton
in thread How do I determine if a file was modified today? by /dev/trash

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