we have soo many methods to delete an element from an array in php but the most common or mostly used methos are-

• unset() = This function takes an element as a parameter and unset it. It wouldn’t change the keys of other elements.
• array_splice() =This function takes parameters an array, offset[where to start] and length. It will automatically re-index an indexed array but not an associated array after deleting the elements.
• array_diff() = This function takes an array and list of array values as input and deletes the giving values from an array.

example

<?php
 
 
 // with unset()
  $cities= ["bangalore","gwalior","delhi"];
  
  unset($cities[2]);
  
		echo "<pre>";
		
  print_r($cities);
  
		echo "</pre>";
		
		
// with array_splice()		
  $cities= ["bangalore","gwalior","delhi"];
  
  array_splice($cities,1,2);
  
		echo "<pre>";
		
  print_r($cities);
  
		echo "</pre>";
		
		
	// with array_diff()
  $cities= ["bangalore","gwalior","delhi"];
  
  $cities=array_diff($cities,["gwalior"]);
  
		echo "<pre>";
		
  print_r($cities);
  
		echo "</pre>";
			
		
?>

output

Array
(
    [0] => bangalore
    [1] => gwalior
)

Array
(
    [0] => bangalore
)

Array
(
    [0] => bangalore
    [2] => delhi
)