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- phpQuery::each($object, $callback) A generic iterator function, which can be used to seamlessly iterate over both objects and arrays.
- phpQuery::grep($array, $callback, $invert) Filter items out of an array, by using a filter function.
- phpQuery::makeArray($obj) Turns an array-like object into a true array.
- phpQuery::map($array, $callback) Translate all items in an array to another array of items.
- phpQuery::inArray($value, $array) Determine the index of the first parameter in the Array (-1 if not found).
- phpQuery::unique($array) Remove all duplicate elements from an array of elements.
- phpQuery::isFunction($obj) Determine if the parameter passed is a function.
- phpQuery::trim($str) Remove the whitespace from the beginning and end of a string.
Read more at Utilities section on jQuery Documentation Site.