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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
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
PHP's Array function is numerous, below is my study summary, takes this to remember, facilitates later ...
one, array definition:The definition of an array is defined using the array () method, and an empty array can be defined:
. Foreach Traversal:
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
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 ' =
This article describes how to remove an empty array or a element with a certain value in PHP, and describes how to use array_filter to filter arrays in php, for more information about how to remove null or a value element from an array in PHP, this
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
Array pointer operation: Moves the array pointer operation: Next () down Gets the value of the current element. Prev () will also get the value of the current element. End () moves to the last element cell to get the value of the last element reset (
Array_unique () of the php array function sequence-removes repeated element values from the array. Array_unique () defines and uses the array_unique () function to remove duplicate values from the array and return the result array. When the values
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PHP iterates through directories, generates MD5 values for each file in the directory, and writes
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