A brief discussion of the array_filter() function

Ask the experts how to understand the code? Doesn’t array_filter require array_filter(array,function)? Does writing the array directly mean that the value of the custom function is zero? Or how to understand? Please give me some advice------Solution--------------------array array_filter (array [, callback callback] ) array_filter() sequentially filters each element in the array array. A value is passed to the callback function. If the callback function returns TRUE, the current value of the array array will be included in the returned result array. The key names of the array remain unchanged. If no callback function is provided, array_filter() will delete all entries in the array whose equal value is FALSE. The equal value of false is empty, false, 0... ------Solution--------

1. Recommended articles about php FILTER_CALLBACK() function

#Introduction: Please ask an expert how to understand the code? Doesn’t array_filter require array_filter(array,function)? Does writing the array directly mean that the value of the custom function is zero? Or how to understand? Please give me some advice------Solution--------------------array array_filter (array [, callback callback] )  array_filter() will arr... .

2. php array array_filter function and array_slice function

##Introduction:: PHP array array_filter function and array_slice function:

3. php Delete Array Elements_PHP Tutorial

Introduction: php delete array elements. If no callback function is provided, array_filter() will remove all entries in input equal to FALSE. You can use this function to delete null elements from an array. Copy the code

4. Code sharing for cleverly using the array_filter() function in PHP to remove multi-dimensional null values_PHP tutorial

Introduction: Code sharing for cleverly using the array_filter() function in PHP to remove multi-dimensional null values. In fact, we can use the array_filter function to easily remove multi-dimensional null values ​​without changing the subscript of the array. The following is an example of usage: ?php $array = array( 0 = 'Tao Ge', 1 = false, 2 = 1, 3

5. php-Arrays function-array_filter-use callback function to filter units in the array_PHP tutorial

Introduction: php-Arrays function-array_filter-uses the callback function to filter the cells in the array. The array_filter() function uses the callback function to filter the cells in the array. [Function] This function passes each value in the specified array to the callback function in turn. Returning True means

6. Why does the callback function not work in array_filter()?

Introduction : Why does the callback function not work in array_filter()?

##7.

The callback function of array_filter() is a trick of PHP. Introduction: The callback function of array_filter(), the magic trick of PHP

##8. php array array_filter() function and array_slice. () function

Introduction: PHP array array_filter() function and array_slice() function

9. PHP removal Methods for null values ​​in array

Introduction: PHP removes null values ​​​​in an array. We can use PHP’s own function array_filter(); Can also be used array_diff() function array_diff — Compute the difference of an array illustrate array array_diff ( array $array1, array $array2 [, array $ ...] ) array_diff() returns an array that includes all items in array

10. Why does the callback function not work in array_filter()

Introduction: Why does the callback function not work in array_filter()?

The above is the detailed content of A brief discussion of the array_filter() function. For more information, please follow other related articles on the PHP Chinese website!