Loop Problems
Array
1. Loop Problems
1.1. Loop Problems
1.1.1. Loop Problems
In actual application, when one or more tasks need to be repeated multiple times, consider using loops.
Solution: in the preceding three types of loops (while, do-while,
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
For Web programming, the most important thing is to access and read and write data. There may be many ways to store them, such as strings, arrays, files, and so on. arrays, which can be said to be a more important way of using PHP data. PHP's Array
①each () function
The each () function needs to pass an array as a parameter, return the key/value pair of the current element in the array, and move the array pointer back to the next element's position. The key/value pair is returned with an
Walkthrough of a PHP Array
This article mainly explains the For,foreach,list,each,key, the pointer operation correlation function, the array_flip, the array_reverse,array_walks and so on function's logarithmic group's traversal
1.for Looping
Php array declaration, traversal, array global variables. Php Tutorial array declaration, traversal, array global variable [php]? ** 1. Array Overview * 1. the essence of arrays: managing and operating a group of variables, batch processing * 2.
Basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Get the value of an arrayArray_keys ($arr); Gets the key name of the arrayArray_flip ($arr); the values in the array are exchanged with the key names (if
arrays, which can be said to be a more important way of using PHP data. PHP's Array function is numerous, below is my study summary, takes this to remember, facilitates later to learn.
1. Array definition
The definition of an array is defined using
basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Gets the value of the array Array_keys ($arr), gets the key name of the array array_flip ($arr), and the values in the array are exchanged with the key
Array loop: loop multiple li sets N data records for each li, li. Array loop: loop multiple li sets N data records for each li. liPHP code: $ arrarray (, 7); $ x1; $ y0; foreach ($ arras $ k $ v) {$ data [$ y] [] $ v; 4. array loop: loop multiple
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