array to lowercase php

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

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

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Some php array learning notes. There are three types of php arrays: a numeric array with a numeric ID key, and an ID key in an array associated with a value multi-dimensional array containing one or more arrays, there are three types of php arrays:

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 ' =

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

An array is a variable that can store a group or a series of values. * Arrays are a basic data type. Array functions can also implement data structures such as stacks and queues. Subscript: the identifier of an array, that is, the code of a string

The array in PHP is actually an ordered map. A mapping is a type that associates values to the keys. This type is optimized in many ways, so you can think of it as a real array, or a list (vector), a hash list (an implementation of a map), a

The technique is not fine, must have the mistake, also please point out, I will correct. Copy the Code code as follows: Header (' content-type:text/html; Charset=utf-8 ');Echo ' ';function Var_array ($array){Echo 'Echo '';}function Printr