Php summary Article 1 (I hope you can add it! Thank you), php Article 1

Php summary Article 1 (I hope you can add it! Thank you), php Article 1

/* Common functions of Arrays
*
* Array sorting Function
* Sort ()
* Rsort ()
* Usort ()
* Asort ()
* Arsort ()
* Uasort ()
* Ksort ()
* Krsort ()
* Uksort ()
* Uatsort ()
* Natcasesort ()
* Array_multisort ()
*
* 1. Simple array sorting
* Sort () rsort ()
* 2. Sort the array by key name
* Ksort () krsort ()
* 3. Sort arrays by element values
* Asort () arsort ()
* 4. Sort arrays by Natural Numbers
* Natsort () // compares uppercase and lowercase letters with natcasescort () // compares uppercase and lowercase letters.
* 5. Sort arrays according to user-defined rules
* Usort () uasort () uksort () sorts keys
* 6. Sort dimension Arrays
* Array_multisort ()
*
* Array functions for splitting, merging, splitting, and joining
* 1. array_slice ()
* 2. array_splice () // Delete
* 3. array_combine () // merge
* 4. array_merge (); // merge
* 5. array_intersect (); // The intersection of multiple arrays
* 6. array_diff (); // returns the difference set of multiple arrays.
*
* Array and data structure functions
* 1. Use an array to implement a stack // advanced post-release
* Array_push () array_pop ()
* 2. Use arrays to implement queues // first-in-first-out
* Array_unshift () array_shift () unset ()
*
*
* Other functions related to Array Operations
* Array_rand ()
* Shuffle ()
* Array_sum ()
* Range ()
*/

// Use simple array sorting
$ Data = array (5, 8, 1, 7, 2 );
Sort ($ data); // sort elements from small to large
Print_r ($ data ); // Array ([0] => 1 [1] => 2 [2] => 5 [3] => 7 [4] => 8)
Rsort ($ data); // sort elements in ascending order.
Print_r ($ data ); // Array ([0] => 8 [1] => 7 [2] => 5 [3] => 2 [4] => 1)

// Example of sorting by key name
$ Data_2 = array (5 => "five", 8 => "eight", 1 => "one", 7 => "seven ", 2 => "two ");
Ksort ($ data_2); // sorts the subscript of the array from small to large.
Print_r ($ data_2 ); // Array ([1] => one [2] => two [5] => five [7] => seven [8] => eight)
Krsort ($ data_2); // sorts the subscript of the array from large to small
Print_r ($ data_2 ); // Array ([8] => eight [7] => seven [5] => five [2] => two [1] => one)

 

// Sort the Array Based on the element value
$ Data_3 = array ("1" => "Linux", "a" => "Apache", "m" => "MySQL ", "l" => "PHP ");
// The difference between asort () arsort and sort () rsort () is that the former keeps the original key name after sorting, while the latter does not keep the original key name, and the key name starts from 0.
Asort ($ data_3 );
Print_r ($ data_3); // Array ([a] => Apache [1] => Linux [m] => MySQL [l] => PHP)
Echo'
';
Arsort ($ data_3 );
Print_r ($ data_3); // Array ([l] => PHP [m] => MySQL [1] => Linux [a] => Apache)
Echo'
';
Sort ($ data_3 );
Print_r ($ data_3); // Array ([0] => Apache [1] => Linux [2] => MySQL [3] => PHP)
Echo'
';
Rsort ($ data_3 );
Print_r ($ data_3); // Array ([0] => PHP [1] => MySQL [2] => Linux [3] => Apache)

// Sort the array by the "natural number sorting method" (0-9 short priority)
$ Data_4 = array ("file.txt", "file11.txt", "file2.txt", "file22.txt ");
Sort ($ data_4 );
Print_r ($ data_4); // Array ([0] => file.txt [1] => file11.txt [2] => file2.txt [3] => file22.txt)
Echo'
';
Natsort ($ data_4 );
Print_r ($ data_4); // Array ([0] => file.txt [2] => file2.txt [1] => file11.txt [3] => file22.txt)
Echo'
';
Natcasesort ($ data_4 );
Print_r ($ data_4); // Array ([0] => file.txt [2] => file2.txt [1] => file11.txt [3] => file22.txt)
Echo'
';

// User-Defined sorting Function
Echo'
';
$ Data_5 = array ("Linux", "Apache", "MySQL", "PHP ");
Usort ($ data_5, "sortbylen"); // sort by element length
Print_r ($ data_5); // Array ([0] => PHP [1] => MySQL [2] => Linux [3] => Apache)
Function sortbylen ($ one, $ two ){
If (strlen ($ one) = strlen ($ two ))
Return 0;
Else
Return (strlen ($ one)> strlen ($ two ))? 1:-1;
}

// Array functions for splitting, merging, splitting, and joining
Echo'
';
$ Data_6 = array ("Linux", "Apache", "MySQL", "PHP ");
Print_r (array_slice ($ data_6,); // remove the Elements marked as 1 and 2
// Array ([0] => Apache [1] => MySQL) subscript reset starts from 0
Echo'
';

Print_r (array_slice ($ data_6,-2, 1); // get one from the second one, not from 0.
// Array ([0] => MySQL) subscript reset starts from 0
Echo'
';

Print_r (array_slice ($ data_6, 1, 2, true ));
// Array ([1] => Apache [2] => MySQL) Retain the original subscript

Echo'
';

// Array_combine ()
$ A1 = array ("OS", "WebServer", "DataBase", "Language ");
$ A2 = array ("Linux", "Apache", "MySQL", "PHP ");

Print_r (array_combine ($ a1, $ a2); // The first parameter is used as the key name, and the second parameter is used as the value for merging.
// Array ([OS] => Linux [WebServer] => Apache [DataBase] => MySQL [Language] => PHP)

Echo'
';

// Array_merge ()
$ A3 = array ("OS", "WebServer", "DataBase", "Language ");
$ A4 = array ("Linux", "Apache", "MySQL", "PHP ");
$ A5 = $ a3 + $ a4;
Print_r ($ a5); // This is displayed because the subscript of the two arrays is repeated.
// Array ([0] => OS [1] => WebServer [2] => DataBase [3] => Language)
Echo'
';
Print_r (array_merge ($ a3, $ a4); // merge and re-Index
// Array ([0] => OS [1] => WebServer [2] => DataBase [3] => Language [4] => Linux [5] => Apache [6] => MySQL [7] => PHP)

Echo'
';

// Array_intersect ()
$ A7 = array ("OS", "WebServer", "DataBase", "Language", 1, 2, 3 );
$ A8 = array ("Linux", "Apache", "MySQL", "PHP", 2, 3, 4 );
Print_r (array_intersect ($ a7, $ a8); // Array ([5] => 2 [6] => 3)
Echo'
';

// Array_diff ()
$ A9 = array (1, 2, 4 );
$ A10 = array (3, 4, 5, 6 );
Print_r (array_diff ($ a9, $ a10); // Array ([0] => 1 [1] => 2)
// Returns the elements of the first array and the second array.
Echo'
';

// Use arrays to implement stacks
$ B = array (1, 2, 4 );
$ B [] = "a"; // inbound Stack
Array_push ($ B, "B", "c"); // use the function to go to the stack.
Print_r ($ B ); // Array ([0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => a [5] => B [6] => c)
Echo'
';

$ Value = array_pop ($ B); // use the function to exit the stack.
Print_r ($ B ); // Array ([0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => a [5] => B)
Echo'
';
Echo $ value; // display the value of the elements in the stack c
Echo'
';

// Use arrays to implement queues
$ C = array (1, 2, 3 );
Print_r ($ c); // Array ([0] => 1 [1] => 2 [2] => 3)
Echo'
';
Array_unshift ($ c, "abc", "bcd"); // enter the team
Print_r ($ c ); // Array ([0] => abc [1] => bcd [2] => 1 [3] => 2 [4] => 3)
Echo'
';
$ Values = array_shift ($ c); // leaves
Print_r ($ c); // Array ([0] => bcd [1] => 1 [2] => 2 [3] => 3)
Echo'
';
Unset ($ c [2]); // deletes the specified position element.
Print_r ($ c); // Array ([0] => bcd [1] => 1 [3] => 3)
Echo'
';

// Array_rand () returns the array subscript randomly.
$ Arr = array );
Echo array_rand ($ arr); // returns the subscript of a random array element.
Echo $ arr [array_rand ($ arr)]; // randomly display the values of array elements
Echo'
';
// Shuffle () randomly rearrange the Array
$ Arr2 = array (32, 35, 33 );
Shuffle ($ arr2 );
Print_r ($ arr2); // random location transformation of array elements
Echo'
';
// Array_sum () summation
$ Arr3 = array (1, 3, 5 );
Echo array_sum ($ arr3); // return 9
Echo'
';
Print_r ($ arr3); // Array ([0] => 1 [1] => 3 [2] => 5)
Echo'
';
// Range (minimum value, maximum value, step size)
$ Arr4 = range (0,100, 10 );
Print_r ($ arr4 ); // Array ([0] => 0 [1] => 10 [2] => 20 [3] => 30 [4] => 40 [5] => 50 [6] => 60 [7] => 70 [8] => 80 [9] => 90 [10] => 100)

?>

 

 

Function of the judgment type :::::::

1. Is_bool () // determines whether it is Boolean
2. Is_float () // determines whether it is a floating point type.
3. Is_real () // same as above
4. Is_int () // determines whether it is an integer.
5. Is_integer () // same as above
6. Is_string () // determines whether it is a string
7. Is_object () // determines whether it is an object
8. Is_array () // determines whether it is an array
9. Is_null () // determines whether it is null
10. Is_file () // determine whether it is a file
11. Is_dir () // determine whether it is a directory
12. Is_numeric () // determines whether it is a number
13. Is_nan () // judge if it is not a number
14. Is_resource () // determine whether it is a resource type
15. Is_a ($ obj, $ classname) // determines whether the object is an instance of a class.

Str _ Type Functions

1. Str_getcsv ($ str); // convert the csv file string into an array
2. Str_replace ($ search, $ replace, $ subject [, & $ count]); // search and replace strings
3. // If the fourth parameter is specified, it is assigned the number of times it is replaced.
4. Str_ireplace ($ search, $ replace, $ subject [, & $ count]); // search and replace strings
5. // If the fourth parameter is specified, it will be assigned a value for the number of replicas, regardless of Case sensitivity.
6. Str_shuffle (string $ str); // randomly breaks the string
7. Str_split ($ str [, $ len = 1]); // converts a string into an array.
8. //, The length of each array unit is $ len

 

Conversion string type ::

1. Strval ($ str); // convert to string type
2. Floatval ($ str); // convert to float
3. Intval ($ str); // converts it to an integer.

Case sensitivity

1. Strtolower ($ str); // convert all to lower case
2. Strtoupper ($ str); // convert all to uppercase

Function for removing html tags

1. Strip_tags ($ str [, $ tags]); // remove all tags not included in $ tags

ASCII conversion numeric array conversion ASCII

1. Chr (int $ ascii); // convert the number to ascii
2. Ord (string $ str); // returns the ascii value of the first character of $ str.

Remove Spaces

　　Trim (string $ str [, string $ charlist]); // remove the left and right characters

1. Trim (string $ str [, string $ charlist]); // remove the left and right characters
2. Ltrim (string $ str [, string $ charlist]); // remove the Left character
3. Rtrim (string $ str [, string $ charlist]); // remove the right character

 

Magic

_ Construct

_ Destruct

_ Set

_ Unset

_ Isset

_ Get

_ Debuginfo

_ Invoke

_ Call

_ Sleep

_ Wakeup

_ Clone

_ ToString

Common Design Patterns

Singleton factory injection observer policy factory method adapter ;;;;

 

Common databases:

ORACLE (ORACLE), MySQL, SQL Server, etc.

 

 

 

 

 

This is just a general summary. Now I want to help beginners !!

For beginners who need it, please comment on it!

It will be updated all the time later !!!!!!!!!!!