Recently teaching a friend PHP, he has no other language basis. The understanding and usage of array is somewhat blurred. So write a tutorial, need a friend can refer to the next
Note the text in the comments section, the code is as follows: value [value])//Key name commonly used with index//type can be int or string [int is what can be checked PHP manual]//so can write//$array = Array (0=> ' a ',1=> ' B ');//You can write The array will automatically replenish the index key name, which defaults to an int value starting with 0 $array = Array (' A ', ' B ');//test cannot use echo can only print an array with Print_r don't ask why, do it right print_r ($array);//Output is Array ([0] = a [1] = b)//You can see that if you do not set the key name [key] It will automatically replenish key//you can also change Key$array = Array (3=> ' a ',5=> ' B ') to;p Rint_r ( $array);//result Array ([3] = a [5] = b)//If you want to read the contents of the array, you can do so echo $array [3];//The result is a//here with Echo because as long as it is not an array, you can directly use the Echo Output/ /key can be a string $array = Array (' AA ' = = ' a ', ' bb ' = ' B ');p Rint_r ($array);//The result is an array ([AA] + a [BB] + B)//So you can also echo $array [' AA ']; Note that strings are enclosed in quotation marks//values [value] can be a variable, which can be an array of $array = Arrays (0=>array (' A ', ' B '), 1=>array (' C ', ' d '));p Rint_r ($array);// The result is an array ([0] = = Array ([0] = a [1] = = b) [1] = = Array ([0] = c [1] + D))//This is called a two-dimensional array//read the contents inside can be this The kind of echo $array [0][1];//result is B can also be used//or can also contain more arrays $array = Array (0=>array (' A ', ' B '), Array (' C ', ' d '), 1=>array (Array (' E ', ' f '), Array (' G ', ' h ')); /looks a little messy, toI slowly understand//return to the actual application of the instantiation of a number of rent $array = Array ();//Simulate a SQL loop SQL mostly with a while loop, I do a simple for 10 times loop Echo '
'; Echo '
' For ($i =0; $i <=10; $i + +) {$array [] = Array (' name ' = ' My Name '. $i, ' age ' = ' my 1 '. $i);//$array [] plus brackets are for him to generate 10 arrays 0-10//If it is $array = Array (' name ' = ' My Name '). I, ' age ' = ' I am 1 '. Then the result is only one array. The last one will take the place of the previous}print_r ($array);//result Array ([0] = = Array ([name] = + my name 0 [age] = My years) [1] = = Array ([name] = = My name is 1 [age] = I am old) [2] = = Array ([name] = + my Name 2 [age] = my old) [3] = = Array ([name] = = I 's name 3 [age] = I'm older) [4] = = Array ([name] = + my name 4 [age] = my old) [5] = = Array ([name] = + my name 5 [ages ] = my age [6] = = Array ([name] = + my name 6 [age] = my ages) [7] = = Array ([name] = + my name 7 [age] My age) [8] = = Array ([name] = + my name 8 [age] = my ages) [9] = = Array ([name] = + my name 9 [age] = my old 19) [Ten] = = Array ([name] = [age] = my 110)//How do I use it???>
'. $value [' name ']. ' | '. $value [' age ']. ';} ?>
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