How To Remove Single Or Multiple Attributes:

Examples:

Example 1: Remove single attribute from an element:

In this example, we have a div with an attribute called “style”. This “style” attribute contains multiple properties such as “background-color” and “color”. We also have a button and when this button is clicked, we will remove the style attribute and the div will appear plain.

<div id="my_div1" style="background-color: gold; color: darkgreen;">This is a div with a single "style" attribute.</div>

<input type="submit" name="sbt_remove_single_property" id="sbt_remove_single_property" value="Remove Style Attribute">

<script type="text/javascript" language="javascript">

   $(document).ready(function () {

       $('#sbt_remove_single_property').on("click", function () {

           $('#my_div1').removeAttr('style');

       });

   });

</script>

Example 2: Remove multiple attributes from an element:

In this example, we have a div with an attribute called “style” and “class”. This “style” attribute contains multiple properties such as “background-color” and “color”. The “class” attribute contains multiple properties that affects the way this div is displayed even further. Next, we have a button and when this button is clicked, we will remove both the “style” and the “class” attributes and the div will appear plain.

<div id="my_div2" class="highlight" style="background-color: lightblue; color: purple;">This is a div with multiple attributes (style and class).</div>

<input type="submit" name="sbt_remove_multiple_properties" id="sbt_remove_multiple_properties" value="Remove Style and Class Attributes">

<script type="text/javascript" language="javascript">

   $(document).ready(function () {

       $('#sbt_remove_multiple_properties').on("click", function () {

           $('#my_div2').removeAttr('style class');

       });

   });

</script>

Conclusion:

So from the above example, we can conclude that we can remove a single attribute or multiple attributes from any element. To remove multiple attributes, simply specifying the attributes separated by space will suffice.

How To use PHP to Replace Array Value

Let’s consider a simple example. Let’s assume that we have an array that consists of fruit names. We will now choose a fruit name (value) and we will replace this value in this array with another value i.e. with another fruit name. In this scenario, there arises 2 cases.

1. Replacing the array value assuming that all values in the array are unique.

2. Replacing the array value assuming that some or all values in the array may be duplicate values of an original value.

So let’s start with the first case.

Example 1: Replacing the Array Value Using PHP assuming that all values in the array are unique

echo 'Example 1 - Replace value "apple" with value "strawberry"<br />';

//Declare an array
$my_fruits_array = array('apple', 'mango', 'grapes', 'pineapple', 'apple', 'guava', 'apple');

//Print the contents of the array.
echo 'Following are the original array contents:<br />';
echo '<pre>';
print_r($my_fruits_array);
echo '</pre>';

//Replace the value "apple" with "strawberry" in the array
$search_for = "apple";
$replace_with = "strawberry";
for($i=0;$i<count($my_fruits_array);$i++) 
{
	if($my_fruits_array[$i] == $search_for) 
	{
		$my_fruits_array[$i] = $replace_with;
	}
}

//Print the contents of the array.
echo 'Following are the array contents AFTER removing the duplicate values from array:<br />';
echo '<pre>';
print_r($my_fruits_array);
echo '</pre>';

Example 2: Replacing the Array Value Using PHP assuming that all mutiple values in the array need replacement

echo 'Example 2: Replace the value "apple" with value "strawberry" and "mango" value with "fig" value in array <br />';

//Declare an array
$my_fruits_array = array('apple', 'mango', 'grapes', 'pineapple', 'apple', 'guava', 'apple', 'mango');

//Print the contents of the array.
echo 'Following are the original array contents:<br />';
echo '<pre>';
print_r($my_fruits_array);
echo '</pre>';

//Replace the value "apple" with "strawberry" value and "mango" value with "fig" value in array
$replacements_array = array( 'apple' => 'strawberry', 'mango' => 'fig');

//For each of the replacement values in the array, loop through the array values
foreach ( $replacements_array as $key1 => $val1 )
{
	//Loop through each of the original $my_fruits_array so that we can check if the value matches with our replacement array key.If yes, we will replace the value of $my_fruits_array with the corresponding replacement value from $replacements_array array.
	foreach ( $my_fruits_array as $key2 => $val2 )
	{	
		//If the value to be reaplaced in replacements_array == already existing value in $my_fruits_array
		if( $key1 == $val2 )
		{
			//Then simply use the index of $my_fruits_array[ to update its value with the replacement value from $replacements_array
			$my_fruits_array[$key2] = $val1;
		}
	}
}

//Print the contents of the array.
echo 'Following are the array contents AFTER removing the duplicate values from array:<br />';
echo '<pre>';
print_r($my_fruits_array);
echo '</pre>';

That’s it!

Do you know of any other ways to use  PHP to replace array values? Feel free to suggest by commenting below.