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This article mainly explains "the example usage of the array_filter () function in php". The explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn the example usage of the array_filter () function in php.

1. The array_filter () function can use the callback function to filter the elements in the array and pass the array elements to the callback function for processing.

2. If the callback function returns true, the current key value in the input array is returned to the result array.

(the array key name remains unchanged)

Example

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