Detailed explanation of php5 and mysql5 web development technology 1 -php array_PHP tutorial

1. Create or extract immediately

Range() quickly creates an array with specified element values.

Example:

range(0,6)

range(0,10,2)

range('a','z')

shuffle() shuffle the order of the array

array_rand() specifies the number of elements and then extracts them. If you extract an element, a variable is returned; if you extract multiple elements, you return an index array

2. Array sorting

sort() Sort according to ASCII code order Sort priority: numbers, letters, Chinese characters

asort() sorts by array associativity

ksort() Sort in ascending order by array index value

krsort () Sort in descending order by array index value

3. Statistical function

array_count_values ​​counts the number of occurrences of array elements

array_sum(array $a) Sum of array elements

count()

sizeof()

4. Array processing

array_combine(array a1,array a2) Array merging a1 as the key name, a2 as the key value

array_unique(array $a)

array_flip() key value swap

5. Search

array_key_exists($key_str, $array)

in_array($value_str, $array,[bool])

6. Move the internal pointer of the array

current()

next()

prev()

end()

7. Obtain the associative array key name

key()

8. Access the key name and key value of the array

array_keys()

array_values()

9. Determine array type (to be added)

is_array()

10. Display content and structure

print_r()

var_dump()

var_export()

11. Element insertion and removal

unset()

array_shift()

array_unshift() insert at the top

array_splice()

array_push()

array_pop()

12. Export content as variables

extract()

13. Others

list ()

each()

for()

foreach()

http://www.bkjia.com/PHPjc/477736.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477736.htmlTechArticle1. Create or extract range() quickly to quickly create an array with specified element values. Example: range(0,6) range(0,10,2) range(a,z) shuffle() shuffle the array order array_rand() specify...