PHP Merge array + number and Array_merge difference, array array_merge_php tutorial

PHP Merge array + number and Array_merge difference, array array_merge

There are two common approaches to array fusion in PHP, one is to add the plus sign directly, and the other is to add it using the Array_merge function, which is a bit different:

1. The natural index in the array will not be reset
2. In the Add method, the values in the added array are not overwritten
The natural index in the 3.merge function is reset
The 4.merge function, which does not matter by the merge and merge relationships, the more the following array parameter, its value, overrides the value of the same key as the previous array parameter

Example:

Array 1:

$arr 1 = Array (  valueof10 ', '  valueof11 ', ' key1 ' = '  dataofkey1 ',  ' key2 ' = ') Dataofkey2 ',  ' array ' = = Array (    ' key1 ' = 1,    ' key2 ' = ' abc ',    ' key3 ' = = Array (      1, 2, ') Name ' = ' Peter '),)  ;

Array 2:

$arr 2 = Array (  newvalueof10 ', '  newvalueof11 ', ' key1 ' = '  newdataofkey1 ',  ' key3 ' = > ' Newdataofkey3 ',  ' array ' = = Array (    ' key1 ' = 2,    ' key2 ' = ' defg ',    ' key3 ' = = Array (      1, 2, ' name ' = ' Jonathan ', ' gender ' = ' male '    ),)  ;

Results comparison:

Array (size=6), String ' Valueof10 ' (length=9) and string ' Valueof11 ' (length=9) ' key1 ' = = String ' Dataofke Y1 ' (length=10) ' Key2 ' + string ' Dataofkey2 ' (length=10) ' array ' = = Array (size=3) ' key1 ' = = int 1 ' key2 ' = = String ' abc ' (length=3) ' key3 ' = = = Array (size=3) 0 = int 1 1 = int 2 ' name ' = = Strin G ' Peter ' (length=5) ' key3 ' = = String ' Newdataofkey3 ' (length=13) array (size=8) 0 = String ' valueof10 ' (length=9) 1 = = String ' valueof11 ' (length=9) ' key1 ' + string ' newdataofkey1 ' (length=13) ' key2 ' = = String ' Dataofkey2 ' (le ngth=10) ' array ' = = Array (size=3) ' key1 ' + int 2 ' key2 ' = = String ' DEFG ' (length=4) ' Key3 ' = AR Ray (size=4) 0 = int 1 1 = int 2 ' name ' = = String ' Jonathan ' (length=8) ' gender ' = ' = String ' Male ' (length=4) 2 = String ' Newvalueof10 ' (length=12) 3 = String ' newvalueof11 ' (length=12) ' key3 ' = = String ' Newdataofkey3 ' (length=13) 

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