php usort multidimensional array

Sort an array: the Usort () function uses a user-defined function to sort the array, with the instance code as follows: function cmp ($a, $b)//user-defined callback function {if ($a = = $b)//If two parameters are equal {return 0;//return 0} return ($

Numeric index array: BOOL Usort (array & $array, callback $cmp _function) The Usort function sorts the specified array (parameter 1) by the specified method (parameter 2). When we want to sort multidimensional arrays, each element of a

Array of numeric indices: BOOL Usort (array & $array, callback $cmp _function) The Usort function sorts the specified array (parameter 1) by the specified method (parameter 2). When we want to sort a multidimensional array, each element of a

From:http://www.php100.com/cover/php/2395.htmlUsort(PHP 4, PHP 5)usort- using a user-defined comparison function to sort values in an arrayDescriptionBOOL usort ( array & $array , callback $cmp _function ) This function will use a user-defined

PHP multi-dimensional array sorting (usort, uasort ). Numeric index array: boolusort (arraylt ;? Php defines multidimensional arrays $ aarray (array (sky, blue), array (apple, red), array (tree, green); custom array comparison function, numeric

Are there any performance differences between the two functions that handle two-dimensional arrays or multidimensional array sorting, using Array_multisort and Usort respectively? Reply content: Are there any performance differences between the

1. Initialization of arrays(1) Create an array with arrayA: $products = array (' tires ', ' oil ', ' Spark plugs ');Array () is actually a language structure, not a function B: Initializing the related array$prices = Array (' Tires ' =>100, ' oil ' =

array_multisort-to sort multiple arrays or multidimensional arrays Description BOOL Array_multisort (array ar1 [, mixed arg [, mixed ... [, array ...]] ) Array_multisort (PHP 4, PHP 5) Returns TRUE if successful, and returns FALSE if it

1. The concept of arrays An array is a named range that is used to store a series of variable values. Each array element has an associated index (also a keyword) that can be used to access elements. PHP allows you to use numbers or strings evenly

Sorting arrays of PHP arrays by multidimensional array The most powerful type in PHP is a non-array! Any type of data can be stored in an array. In the project development, the sorting of the array is a commonplace, this article mainly summarizes