UNIX: Recursively chmod directories only

After my other post on , I had a few problems with images I copied over from another site. The file permissions were all messed so I did some recursive permission fixes.
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Using MySQL date functions to save time in PHP

Ever since I started using PHP, if I ever needed to store a timestamp I always stored it as an INT. Only until recently have I switched over to using the DATETIME and TIMESTAMP data types in MySQL exclusively for any dates I needed. These fields are in the format of YYYY-MM-DD HH:MM:SS. When I first start using these field types, I didn’t know how to convert back and forth to a UNIX timestamp for use in PHP so I made a bunch of functions in PHP to convert between the two. That was until I found out about the MySQL date and time functions.

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