13.5. Checking Whether a File Exists
The act of checking whether a file exists is one of the most basic file-related tasks you'll want to do, and file_exists( ) makes it as easy as it should be. Specify the filename to check as the only parameter, and it returns true if the file exists and false otherwise. For example:
if (file_exists("snapshot1.png")) {
print "Snapshot1.png exists!\n";
} else {
print "Snapshot1.png does not exist!\n";
}
 | The result of file_exists( ) is cached, which means you first need to call the clearstatcache( ) function if you want to be absolutely sure a file exists. |
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