2/17/11

Touch: PHP vs Linux

Linux's touch (in coreutils) opens and closes the file.
PHP's touch uses the 'utime' system call to change access/modify time of the file inode.

I was using inotify to watch a file and was surprised to find when PHP 'touch'es the file, nothing happened. After some digging I found the two 'touch'es are different.

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