Using onclick to execute a PHP function

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Using onclick to execute a PHP function

Author：JIYIK Last Updated：2025/04/13 Views：

We will also introduce another onclick()method of executing PHP functions through events using the jQuery library. This method calls a JavaScript function that will output the content of the PHP function in the web page.

We will also demonstrate another onclick()way to execute PHP functions using events, calling PHP functions using pure JavaScript.

This article will introduce a method to execute a PHP function, using GETthe method to send data in the URL and isset()the function to check GETthe data. This method calls a PHP function if the data is set and executes the function.

Use jQuery `onclick()`to execute PHP functions through events

We can use jQuery to execute an event by writing a function that executes a PHP function onclick(). For example, create a PHP file echo.phpand write a function php_func(). Write a message inside the function Have a great dayand call the function. In another PHP file, scriptwrite some jQuery inside a tag. Don't forget to link the web page with the jQuery source. In HTML, write a tag with onclick()an attribute button. Write the attribute value as test()a function. buttonWrite your text between the tags Click. Create an empty divtag below the button. scriptWrite the function inside the tag test(). echo.phpWrite an AJAX method with the URL of and resultwrite a function with as a parameter success(). Then use a selector to select divthe tag and use text()the function and resultas parameters.

In the following example, we use the AJAX method to perform an asynchronous HTTP request. URL specifies the URL to send the request to, and success()the function runs when the request is successful. The method sends the request to echo.phpthe file, which is located in the same location as the current PHP file. If the request is successful, success()the function returns the result, which is printed out.

Sample code:

#php 7.x
<?php
function php_func(){
    echo " Have a great day";
}
php_func();
?>

<script>
function test(){
    $.ajax({url:"echo.php", success:function(result){
    $("div").text(result);}
})
} 
</script>

<button onclick="test()"> Click </button>
<div> </div>

Output:

Have a great day

`onclick()`Execute PHP functions via events using pure JavaScript

This method uses JavaScript to execute onclick()a PHP function with an event. For example, write a PHP function php_func()that displays a message Stay Safe. buttonCreate a Clickbutton named using the tag. onclick()Assign the function as an attribute and clickMe()the function as its value. scriptWrite the function inside the tag clickMe(). Create a variable resultand call it inside the PHP tag php_func(). Use document.write()the function and resultas parameters to print the output.

In the example below, a JavaScript function clickMe()is executed when we click the button. Then, a PHP function is executed from the JavaScript function php_func(). resultA variable stores the result from the PHP function and is printed out.

Code example:

#php 7.x
<?php
function php_func(){
echo "Stay Safe";
}
?>

<button onclick="clickMe()"> Click </button>

function clickMe(){
var result ="<?php php_func(); ?>"
document.write(result);
}

Output:

Stay Safe

Execute PHP functions from links using `GET`the method and function`isset()`

We can GETset the URL of the link using data and check if the data has been isset()set using the function. We can create a PHP function and call the function if the data has been set. For example, write a function myFunction()and display a message inside the function Have a great day. Create a link using an anchor tag. hrefSet the attribute of the tag to index.php?name=true. Write a text between the anchor tags Execute PHP Function. Check if it is set using the function with $_GETthe variable . Call the function inside the block .isset()nameifmyFunction()

In the following example, GETdata is sent through the URL. nameThe value of is set to true. isset()The function returns true, the function myFunction()executes and displays a message.

Sample code:

# php 7.x
<!DOCTYPE HTML>
<html>
<?php
function myFunction() {
    echo 'Have a great day'.'<br>';
 }
if (isset($_GET['name'])) {
    myFunction();
}
?>
<a href='index.php?name=true'>Execute PHP Function</a>
</html>

Output:

Have a great day

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