Summary of practical tutorials on function sequences

array_unique() Definition and Usage The array_unique() function removes duplicate values ​​from an array and returns the resulting array. When the values ​​of several array elements are equal, only the first element is retained and the other elements are deleted. The key names in the returned array remain unchanged. Syntax array_unique(array) Parameter Description array Required. Specifies the input array. Description array_unique() first sorts the values ​​as strings, then retains only the first encountered key name for each value, and then ignores all subsequent key names. This does not mean that the first occurrence of the same value in an unsorted array will be preserved. Tips and Notes Note: The returned array will retain the key type of the first array element. Example "Cat&qu

1. php array function sequence array_unique() - remove duplicate element values ​​in the array

Introduction: The array_unique() function removes duplicate values ​​from the array and returns the result array. When the values ​​of several array elements are equal, only the first element is retained and the other elements are deleted. .

##2. php array function sequence array_splice() - insert elements at any position in the array

Introduction: The array_splice() function is similar to the array_slice() function. It selects a series of elements in the array, but does not return them. Instead, it deletes them and replaces them with other values

3. php array function sequence array_values() Functions and methods to obtain array element values

Introduction: The array_keys() function returns a new array containing all the keys in the array. If the second parameter is provided, only the keys with the value# are returned.

php array function sequence shuffle() and array_rand() introduction to the use of random functions

array_pop() of php array function sequence. - Delete the last element in the array

##Introduction: Definition and usage array_pop() function deletes the array The last element of

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##Introduction: The array_key_exists() function determines whether the specified key exists in an array. If the key exists, it returns true, otherwise it returns false

7. php array function sequence in_array() finds whether the array value exists

Introduction: in_array() function searches for a given value in the array

8. array_keys() of php array function sequence - Get the array key name

Introduction: The array_keys() function returns a new array containing all the key names in the array. If the second parameter is provided, only the key names with the key value

9. php array function sequence array_keys() - Get the array key name

Introduction: The array_keys() function returns a new array containing all the key names in the array. If the second parameter is provided, only the key name with the key value is returned

10. php array function sequence array_unique() - remove duplicates in the array Element value

Introduction: array_unique() function removes duplicate values ​​in the array and returns the result array. When the values ​​of several array elements are equal, only the first element is retained and the other elements are deleted.

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