PHP numeric index Array Instance usage summary

Type of PHP array-numeric index array What is a PHP numeric index array? This is the most common array type, most programming languages have a numeric index array the PHP numeric index array generally represents the position of the array elements in the array, which consists of numbers, subscript starting from 0, the numeric index array default index value is starting from the number 0, do not need to specify, PHP An integer value is automatically assigned to the key name of the indexed array, and then automatically increments from that value, or you can specify to start saving the data from a location. Arrays can be created as a series of "key-value (key-value) pairs" where each pair is an item or element of an array. For each item in the array, there is a key (key) associated with it, or the index corresponds to it. The numeric index key values are as follows: A case of a numeric index array: <?phpheader ("content-type:text/html; Charset=utf-8 "); $array = array

1. Type of PHP array-numeric index array

Introduction: The PHP numeric index array generally represents the position of the array element in the array, it is composed of numbers, the subscript starting from 0, the index array default index value is starting from the number 0, do not need to specifically specify, PHP automatically assigns an integer value to the index array's key name, and then from this value to start the automatic increment, of course, You can also specify to start saving data from a location.

2. Effect and function of white flower snake tongue and its edible method sharing of PHP traversal array

Introduction: Effect and function of white flower snake tongue and its edible method: effect and function of white flower snake tongue and its edible methods PHP iterates through the array: in PHP, arrays are divided into two categories: numeric indexed arrays and associative arrays. Where the numeric index array is the same as the array in the C language, the subscript is for 0,1,2 ... Associative array subscripts may be of any type, similar to Hash,map in other languages. Method 1:foreach Copy the code code as follows: <?php $sports = Array (' Football ' = ' good ', ' swimming ' = ' very well ', ' run

3. Extractdata PHP extract a function that splits an array into multiple variables

Summary: Extractdata:extractdata PHP extract a function that splits an array into multiple variables: Extract () function syntax: int extract (array $var _array [, int $extract _type = E Xtr_overwrite [, String $prefix]]) function: the extract () function extracts an associative array (invalid for a numeric index array) for each pair of keys and value, generating multiple sets of new variables with key as the variable name and value as the corresponding values. Copy the code code as follows: <?php $si

4. Alwayscomebacktoyourlove PHP multidimensional Array sorting usort,uasort

Description: Alwayscomebacktoyourlove:alwayscomebacktoyourlove PHP multidimensional array usort,uasort: 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 multidimensional array is an array type, and how do two arrays compare size? This needs to be customized by the user (by comparing the first element of each array or ...). Copy the code code as follows:

5. Torrent Kitty Search PHP array traversal method Daquan Foreach,list,each

Introduction: Torrent kitty search:torrent kitty search PHP Array traversal method Daquan Foreach,list,each: In PHP, the array is divided into two categories: Numeric index array and associative array. Where the numeric index array is the same as the array in the C language, the subscript is for 0,1,2 ... Associative array subscripts may be of any type, similar to Hash,map in other languages. Here are three ways to traverse associative arrays in PHP: Method 1:foreach Copy code code as follows: <?php $sports = Array (' Football ' =

6. The ancients four brothers from the big to the small ranking sequence PHP simple array sorting implementation code

Brief introduction: The Ancients four brothers from the big to the small ranking order: the Ancients four brothers from the big to the small ranking order php simple array Sorting implementation code: PHP simple Array sorting method, for everyone to learn the reference. PHP does not know how to compare two arrays and needs to create a way to compare them. First, the numeric index array initialization copy code code is as follows: $arr = array (' 100 ', ' 200 ', ' 300 '); The code creates an array and contains 3 values. The numeric index of the PHP array starts at 0. So the value of $arr[0] is 100. You can copy the values in one array into another array with a simple "=" sign. If you need

7. PHP Base--php Array

Introduction: PHP base--php array: PHP arrays are somewhat different from arrays in other languages, in PHP, arrays contain two types of arrays: numeric indexed array associative array where the numeric index array refers to its key as a number, while the latter can use a string as its key, which is equivalent to map. 1. Declaration and initialization of array declarations and initializations using the function array (), the format is as follows: $a = array () for arrays of numeric indexes, as follows: <?php$a = Array ("A", "B", "C");p Rint_r ($a);

8. PHP simple array Sorting implementation Code _php tutorial

Introduction: PHP Simple array sorting implementation code. PHP simple array Sorting method for everyone to learn the reference. PHP does not know how to compare two arrays and needs to create a way to compare them. First, the initialization of the numeric index array

9. PHP multidimensional array sorting (usort,uasort) _php Tutorial

Summary: PHP multidimensional array sorting (Usort,uasort). Numeric index array: bool Usort (array lt;?). PHP//define multidimensional Array $a = Array ("Sky", "Blue"), Array ("Apple", "red"), Array ("Tree", "green"); Custom array comparison functions,

PHP Array Traversal method Daquan (Foreach,list,each) _php Tutorial

Introduction: PHP Array Traversal method Daquan (Foreach,list,each). In PHP, arrays are divided into two categories: numeric indexed arrays and associative arrays. Where the numeric index array is the same as the array in the C language, the subscript is for 0,1,2 ... and the associative array subscript may be any