PHP array_merge Merge split two arrays _php tutorial

The Array_merge function of the array and the + operator are confusing, and the difference between them is found by writing a small program. In particular, the + operator, which means that the right array unit (DE-duplication) is appended to the left-hand array.

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$arr 1=array ("A", "B", "C"); $arr 2=array ("C", "D", "E"); $myarray =array_merge ($arr 1, $arr 2); Print_r ($myarray); $myarray =array_unique ($myarray); Print_r ($myarray); ?>

Cases

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$array 1=array (1, 2);//array 1 $array 2=array (2, 3);//Array 2 $array 3=array_merge ($array 1, $array 2);//merge arrays; $array 3=array_unique ($array 3);//Remove duplicate values from the divisor group ?>

Example

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echo "RN The first case of Rn"; $a =array (1,2,3,4,5,6); $b =array (7,8,9); $c =array_merge ($a, $b); Print_r ($c); $c = $a + $b; Print_r ($c); $c = $b + $a; Print_r ($c); echo "RN The second case of Rn"; $a =array (' A ', ' B ', ' C ', ' d ', ' e ', ' f '); $b =array (' A ', ' x ', ' Y '); $c =array_merge ($a, $b); Print_r ($c); $c = $a + $b; Print_r ($c); $c = $b + $a; Print_r ($c); echo "RN The third case of Rn"; $a =array ( 1=> ' A ', 2=> ' B ', 3=> ' C ', 4=> ' d ', 5=> ' E ', 6=> ' F '); $b =array ( 1=> ' A ', 7=> ' x ', 8=> ' y '); $c =array_merge ($a, $b); Print_r ($c); $c = $a + $b; Print_r ($c); $c = $b + $a; Print_r ($c); ?> The results are as follows: First case Array ( [0] = 1 [1] = 2 [2] = 3 [3] = 4 [4] = 5 [5] = 6 [6] = 7 [7] = 8 [8] = 9 ) Array ( [0] = 1 [1] = 2 [2] = 3 [3] = 4 [4] = 5 [5] = 6 ) Array ( [0] = 7 [1] = 8 [2] = 9 [3] = 4 [4] = 5 [5] = 6 ) The second case Array ( [0] = a [1] = b [2] = C [3] = d [4] = = E [5] = f [6] = a [7] = X [8] = y ) Array ( [0] = a [1] = b [2] = C [3] = d [4] = = E [5] = f ) Array ( [0] = a [1] = X [2] = y [3] = d [4] = = E [5] = f ) The third case Array ( [0] = a [1] = b [2] = C [3] = d [4] = = E [5] = f [6] = a [7] = X [8] = y ) Array ( [1] = a [2] = b [3] = C [4] = d [5] = = E [6] = f [7] = X [8] = y ) Array ( [1] = a [7] = X [8] = y [2] = b [3] = C [4] = d [5] = = E [6] = f )

Split fraction Group Array_slice ()
The Array_slice () function returns a portion of the array, starting with the key offset and ending at the offset+length position. Its form:

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1.array array_slice (array array, int offset[,int length])
Array array_slice (array array, int offset[,int length])
When offset is positive, the split starts at offset from the beginning of the array, and if offset is a negative value, the split starts at the offset position at the end of the array. If the optional parameter length is omitted, the split starts at offset and continues to the last element of the array. If length is given and is positive, the offset+length position ends at the beginning of the array. Conversely, if length is given and is negative, the count (Input_array)-|length| position at the beginning of the array ends. Consider an example:

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$fruits = Array ("Apple", "Banana", "Orange", "Pear", "Grape", "Lemon", "watermelon"); $subset = Array_slice ($fruits, 3); Print_r ($subset); Output Array ([0] = Pear [1] = Grape [2] = = Lemon [3] = = Watermelon) ?>

Then we use the following negative length:

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$fruits = Array ("Apple", "Banana", "Orange", "Pear", "Grape", "Lemon", "watermelon"); $subset = Array_slice ($fruits, 2,-2); Print_r ($subset); Output Array ([0] = Orange [1] = Pear [2] = Grape) ?>

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