How to remove HTML tags from array elements in PHP

When developing web applications, we often need to obtain information from user input and process it. However, the data entered by the user often contains HTML tags, such as

, , etc. When displaying this data, we often want to remove HTML tags and retain plain text content.

In PHP, we can use some functions and methods to accomplish this task. Here's a common approach.

Step 1: Create a function to remove HTML tags

First, we can create a function to remove HTML tags from a string. This function makes use of PHP's built-in strip_tags function, which is used to remove HTML and PHP tags from a string.

function removeHTMLTags($string){
    return strip_tags($string);
}

Step 2: Loop through the array elements

Next, we need to loop through the array and apply the above function to each array element. For this we can use foreach loop.

function removeHTMLTagsFromArray($array){
    foreach($array as &$value){
        $value = removeHTMLTags($value);
    }
    return $array;
}

In the above code, we use the reference symbol (&) to ensure that the original array is modified instead of creating a copy.

The following is a complete sample code:

function removeHTMLTags($string){
    return strip_tags($string);
}

function removeHTMLTagsFromArray($array){
    foreach($array as &$value){
        $value = removeHTMLTags($value);
    }
    return $array;
}

// 测试代码
$array = [
    "
Hello, world!
",
    "PHP is awesome!",
    "
Welcome to my website
"
];

$array = removeHTMLTagsFromArray($array);

print_r($array);

Run the above code, the output is as follows:

Array
(
    [0] => Hello, world!
    [1] => PHP is awesome!
    [2] => Welcome to my website
)

As we can see, each element in the array HTML tags have been successfully removed and plain text content retained.

Summary

Using PHP's built-in strip_tags function, you can easily remove HTML and PHP tags from strings. We can easily convert an array containing HTML tags into an array containing only plain text content by applying this function to each element of the array.

When we need to display user input data, removing HTML tags is an important task. This ensures that our website is more secure and reliable when displaying data, and that it renders consistently across a variety of devices and browsers. At the same time, we can also use other methods to achieve the effect of removing HTML tags. This is just one of the common and simple methods.

I hope this article can help you understand how to remove HTML tags from array elements in PHP.

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