You want to find all filenames that match a pattern.
Use a FilterIterator subclass with DirectoryIterator. The FilterIterator subclass needs its own accept() method that decides whether or not a particular value is acceptable.
To only accept filenames that end with common extensions for images:
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class ImageFilter extends FilterIterator { public function accept() { return preg_match('@\.(gif|jpe?g|png)$@i',$this->current()); } } foreach (new ImageFilter(new DirectoryIterator('/usr/local/images')) as $img) { print "<img src='".htmlentities($img)."'/>\n"; } |
The FilterIterator encloses a DirectoryIterator and only allows certain elements to emerge.
It’s up to the accept() method to return true or false to indicate whether a particular element (accessed with $this->current()) is OK.
In the Solution, accept() uses a regular expression to make that determination, but your code can use any logic you like.
If your pattern can be expressed as a simple shell glob (e.g., *.*), use the glob() function to get the matching filenames.
For example, to find all the text files in a particular directory:
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foreach (glob('/usr/local/docs/*.txt') as $file) { $contents = file_get_contents($file); print "$file contains $contents\n"; } |
The glob() function returns an array of matching full pathnames. If no files match the pattern glob(), returns false.
