Curl testing script in PHP

Reading URL
Posting and receiving Data using query string.
Posting and receiving Data using POST method.
Uploading file .

Reading URL using cURL

$my_curl = curl_init(); // Initializes a new session and returns a cURL handle  
curl_setopt($my_curl, CURLOPT_URL, "https://www.google.com"); // Set the Option  
curl_exec($my_curl); // Retrieve data and show  
curl_close($my_curl); // Close the handler

Sending data through query string and receiving data as string and displaying.
About Query string and GET Method of passing data.

<?php  
$my_curl = curl_init();  
$str = "John";  // Data as query string parameter  
curl_setopt($my_curl, CURLOPT_URL, "https://www.plus2net.com/php_tutorial/curl-test.php?str=$str");  
curl_setopt($my_curl, CURLOPT_RETURNTRANSFER, 1); // Return as String  
$return_str = curl_exec($my_curl); // Execute and return as string  
curl_close($my_curl); // Close the handler  
echo $return_str; // Show the string received from URL  
?>

output

Welcome John

Data is submitted to the page curl-test.php at plus2net.com server. Here the following code is kept to receive and return the data.

<?php  
@$str = $_GET['str']; // Collect data from query string  

if (strlen($str) > 0) {  
    echo "Welcome $str";  
} else {  
    echo "No data received";  
}  
?>

Using POST method & array

We will pass one array of option values and use the POST method to send data to remote server. The response is displayed.

<?php  
$my_curl = curl_init(); // New cURL handler  

$my_array = array(  
    CURLOPT_URL => 'https://www.example.com/my_script.php',  
    CURLOPT_POST => true,  
    CURLOPT_RETURNTRANSFER => true,  
    CURLOPT_FOLLOWLOCATION => true,  
    CURLOPT_POSTFIELDS => array(  
        'f_name' => 'Alex',  
        'l_name' => 'John',  
    )  
);  

curl_setopt_array($my_curl, $my_array); // Use the array  

$return_str = curl_exec($my_curl); // Execute and get data  
curl_close($my_curl); // Close the handler  

echo $return_str; // Display the output  
?>

Output is here

Welcoem Alex John

The script at remote server ( my_script.php )is here.

<?php  
@$f_name = $_POST['f_name'];  
@$l_name = $_POST['l_name'];  

if (strlen($f_name) > 0) {  
    echo "Welcome $f_name $l_name";  
} else {  
    echo "No data received";  
}  
?>

Uploading file using CURL

Syntax for creating CURLFile object.

curl_file_create( path, mime_type, posted_filename );

path : Full path of the file to be uploaded.
mime_type:(Optional) File MIME type.
posted_filename : (Optional) file name of uploaded file.
Our posted data must match with the accepting script while uploading the file. Here we have used the same location ( script ) as given in this basic file upload script with the source code to download.
We are creating the CURLFile object by using curl_file_create()

// Create one CURLFile object  
if (function_exists('curl_file_create')) { // PHP 5.5+  
    $cFile = curl_file_create($path, 'image/jpeg');  
} else {  
    $cFile = '@' . realpath($path);  
}

In our upload script we have the file name parameter as file_up, so we will create the array using this name file_up as key and using the curl file object $cFile as value.

CURLOPT_POSTFIELDS => array(  
    'file_up' => $cFile  
)

In our file upload script we are sending the file only without any other data. However other data can be included by expanding the array with other key value pairs.
Here is the full code.

$my_curl = curl_init(); // New cURL handler  

$path = 'D:\\top2.JPG'; // Path of the file to upload  

// Create one CURLFile object  
if (function_exists('curl_file_create')) { // PHP 5.5+  
    $cFile = curl_file_create($path, 'image/jpeg');  
} else {  
    $cFile = '@' . realpath($path);  
}  

$my_array = array(  
    CURLOPT_URL => 'http://localhost/plus2_upload_v1/uploadck.php',  
    CURLOPT_POST => true,  
    CURLOPT_RETURNTRANSFER => true,  
    CURLOPT_FOLLOWLOCATION => true,  
    CURLOPT_POSTFIELDS => array(  
        'file_up' => $cFile  
    )  
);  

curl_setopt_array($my_curl, $my_array); // Use the array  
$return_str = curl_exec($my_curl); // Execute and get data  

curl_close($my_curl); // Close the handler  

echo $return_str; // Display the output

uploadck.php

This file will receive the data and upload the file. Here the full code of this is available.
Copy or Download the source code for uploadck.php file from here.
OR, use this minimum code to place the uploaded file inside the upload directory.

Below code will allow all type of files of any size. This can be a security issue. Use carefully for testing in local environment and don’t expose uploading code to outside to upload malicious files.

<?php  
$file_name = $_FILES['file_up']['name'];  

// Create upload directory on the same path as the script.  
$add = "upload/$file_name"; // Path to store uploaded file  

if(move_uploaded_file($_FILES['file_up']['tmp_name'], $add)) {  
    echo "File uploaded";  
} else {  
    echo "File Not uploaded";  
}  
?>

PageSpeed Insights (PSI)

PageSpeed Insights analyzes the content of a web page and generates suggestions to make it faster. This service evaluates web performance using both lab and field data to provide recommendations for improvement.

By leveraging both real-user experiences and simulated environments, PageSpeed Insights offers a comprehensive view of a page's performance. This helps developers optimize their sites, ensuring faster load times and a better user experience. For more information, visit Google's PageSpeed Insights.

<?php  
$key = 'YOUR_API_KEY'; # Your API Key  
$url = 'https://www.plus2net.com/';  

$x = 'https://www.googleapis.com/pagespeedonline/v5/runPagespeed?url=' . $url . '&key=' . $key . '&strategy=mobile';  

$my_curl = curl_init();  
$str = "John";  // Data as query string parameter  

curl_setopt($my_curl, CURLOPT_URL, $x);  
curl_setopt($my_curl, CURLOPT_RETURNTRANSFER, 1); // Return as String  

$json_data = json_decode(curl_exec($my_curl));  
$data = $json_data->lighthouseResult->categories->performance->score;  

echo $data;  

curl_close($my_curl); // Close the handler  
?>

Copying all files from source directory to remote server using cURL Webpage Auditor using cURL
Opening a URL by file_get_contents()
PHP Scripts

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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cURL Examples in PHP