How to filter out the number of empty rows when importing excel in php

1. There are many ways to remove empty elements from an array in PHP, but there is a system function that is the most convenient: array_filter (parameter 1, parameter 2)

2. This function transfers each value in the "Parameter 1" array to the "Parameter 2" function in turn

3. If the "Parameter 2" function returns TRUE, then the current value of the "Parameter 1" array Will be included in the returned result array

4. The key name of the array remains unchanged. If you only need to remove empty elements in the array, parameter 2 can be omitted

5. Add it to the array:

$arr1=array( "a" => 1 ,  "b" => 0 ,  "c" => 3 ,  "d" => "" ,  "e" => 5
执行结果为，array( "a" => 1 ,   "c" => 3 ,   "e" => 5 )

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