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
This paper illustrates the common operation of JS array and the method of mutual transformation between array and string. Share to everyone for your reference, specific as follows:
The transformation of array and string
Common
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 ($arr), and the values in the array are exchanged with the key
Basic functions of array manipulationThe key name and value of the arrayArray_values ($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
The process of learning PHP, sorting out some of the commonly used functions, which are array functions.
Array (): Generate an array$a = Array ("Dog", "cat", "horse");Print_r ($a); Array ([0] = dog [1] = cat [2] = = horse)Array_combine ():
String method, return value, whether to change the original string:The 1charAt () method returns the character at the specified position.Do not change the original stringJavaScript does not have a character data type that differs from a string type,
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