The php page uses JavaScript to display hidden code when clicking the button

PHP (Hypertext Preprocessor) is a server-side programming language suitable for dynamic web development. In PHP, we can use JavaScript to control the display of web pages, including showing and hiding code blocks. In this article, we'll cover how to use PHP and JavaScript to show and hide code when a button is clicked.

Step One: Create a Button

First, create a button in the page where the button is needed. To create a button, add the following code in the HTML file:

<button id="showCode">显示代码</button>

In this button element, we have defined an ID with the name "showCode".

In addition, we also added a "Show Code" text to the button.

Step 2: Add the code that needs to be hidden or displayed

Next, add the code that needs to be displayed and hidden in the code of the page.

In this example, we will use a DIV element and some sample code to illustrate.

In the HTML file, add the following code:

<div id="code" style="display:none;">
    <p>这里是一些示例代码：</p>
    <ul>
        <li>代码示例1</li>
        <li>代码示例2</li>
        <li>代码示例3</li>
    </ul>
</div>

In this DIV element, we define a name with the ID "code". Additionally, we set it to "display:none;" which means the element will be hidden while the page loads.

Step 3: Add JavaScript script

To enable the button to control the display and hiding of the code, we need to add some JavaScript code.

In the HTML file, add the following code:

<script>
    document.getElementById("showCode").addEventListener("click", function(){
        var code = document.getElementById("code");
        if(code.style.display === "none"){
            code.style.display = "block";
            document.getElementById("showCode").innerHTML = "隐藏代码";
        }else{
            code.style.display = "none";
            document.getElementById("showCode").innerHTML = "显示代码";
        }
    });
</script>

This JavaScript code defines an event that occurs when a button is clicked. It looks for the DIV element with ID "code" and checks if it is hidden. If it is currently hidden it will show the code div element and vice versa.

Additionally, when the user clicks the button, the script will change the button text to reflect the current state of the div element.

Step 4: Test the button

Now that we have created the button, added the code that needs to be shown or hidden, and added the JavaScript script, we can test Are the buttons working properly? On clicking the button on the page we should see the code's show or hide state change.

In this example, the button will change from "Show Code" to "Hide Code" to reflect its current state.

Summary

In this article, we introduced how to use PHP and JavaScript to show and hide code when clicking a button. We can control the display and hiding of code elements by creating a button, adding the code that needs to be hidden or shown, and using JavaScript to respond to click events. As our web pages become more complex, this technology can give us more flexible control over their appearance and functionality.

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