PHP delete array elements and delete duplicate array functions_PHP tutorial

PHP deletes array elements and deletes duplicate array functions. This article mainly talks about deleting array values ​​in PHP. It tells you how to delete elements at a specified position in an array. The second part tells you how to use the array_keys function. ​

php tutorial to delete array elements and delete duplicate array functions
This article mainly talks about deleting PHP array values. It tells you how to delete elements at a specified position in an array. The second article tells you how to use the array_keys function to delete duplicate elements of an array.
*/

$a=array("red", "green", "blue", "yellow");
count($a); //get 4
unset($a[1]); //Delete the second element
count($a); //get 3
echo $a[2]; //There are only three elements in the array. I wanted to get the last element, but I got blue,
echo $a[1]; //No value

//array array_splice (array input, int offset [, int length [, array replacement]])
//array_splice() is actually a function that replaces array elements, but if you do not add a replacement value, it simply deletes the element. The following is the usage of array_splice():
$b=array("red", "green", "blue", "yellow");
array_splice($a,1,1);

//Let’s look at a more comprehensive method of deleting duplicate values ​​and deleting specified array elements

$array1 = array(1 => "www.bkjia.com", 2 => "Pineapple", 4 => " => "Banana",4 => "Guava",5 => " => "www.bkjia.com");

$search_keys = array_keys($array1, "www.bkjia.com");

foreach($search_keys as $key) {
unset($array1[$key]);
}

print_r($array1);

/*
Get results
array ( [2] => Pineapple [4] => Guava [3] => Banana )
*/

//Function to delete duplicate elements in an array
function delmember(&$array, $id)
{
$size = count($array);
for($i = 0; $i <$size - $id - 1; $i ++)
{
$array[$id + $i] = $array[$id + $i + 1];
}
unset($array[$size - 1]);
}

?>

http://www.bkjia.com/PHPjc/445431.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445431.htmlTechArticlePHP deletion of array elements and deletion of duplicate array functions This article is mainly about deletion of php array values, let me tell you How to delete an element at a specified position in an array, the second paragraph tells you...