array_splice definition and usage
The Array_splice () function, like the Array_slice () function, selects a series of elements in an array, but does not return, but instead deletes them and replaces them with other values.
If the fourth argument is supplied, the previously selected elements will be replaced by the array specified by the fourth parameter.
The last generated array will be returned.
Grammar
Array_splice (array,offset,length,array) parameter description
Array required. Specifies the array.
Offset required. Numerical. If offset is positive, the offset specified by the value in the input array begins to be removed. If offset is negative, it is removed from the offset specified by the value of the countdown at the end of the input array.
Length is optional. Numerical. If this argument is omitted, all parts of the array from offset to end are moved. If length is specified and positive, then so many elements are removed. If length is specified with a negative value, all elements in the middle of offset to the end of the array ending with length are removed.
The element to which the array is removed is substituted by the elements in this array. If no value is removed, the elements in this array are inserted into the specified position.
Hints and Notes
Tip: If the function does not delete any elements (length=0), the alternate array is inserted from the position of the start parameter. (see example 3)
Note: The keys in the alternate array are not preserved.
Example 1
Copy CodeThe code is as follows:
$a 1=array (0=> "Dog",1=> "Cat",2=> "Horse",3=> "Bird");
$a 2=array (0=> "Tiger",1=> "Lion");
Array_splice ($a 1,0,2, $a 2);
Print_r ($a 1);
?>
Output:
Array ([0] = Tiger [1] = Lion [2] = = Horse [3] = Bird) Example 2
The same as Example 1, but the output returns an array:
Copy CodeThe code is as follows:
$a 1=array (0=> "Dog",1=> "Cat",2=> "Horse",3=> "Bird");
$a 2=array (0=> "Tiger",1=> "Lion");
Print_r (Array_splice ($a 1,0,2, $a 2));
?>
Output:
Array ([0] = Dog [1] = Cat) Example 3
The length parameter is set to 0:
Copy CodeThe code is as follows:
$a 1=array (0=> "Dog",1=> "Cat");
$a 2=array (0=> "Tiger",1=> "Lion");
Array_splice ($a 1,1,0, $a 2);
Print_r ($a 1);
?>
Output:
Array ([0] = Dog [1] = Tiger [2] = Lion [3] = Cat)
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