PHP
How to connect to SFTP using PHP8.3.
To ensure the connection is SFTP, we need to use PHP’s SSH2 extension instead of the FTP functions. The ssh2_sftp extension allows secure file transfers over SFTP. Updated SFTP Upload Function This version connects to an SFTP server on port 22, uploads an XML file to the /data directory, and closes the connection when done. […]
PHP
Verify a reCAPTCHA using PHP 8.3
Here’s a PHP 8.3 function to verify a reCAPTCHA response with Google’s server. Ensure you replace YOUR_SECRET_KEY with your actual reCAPTCHA secret key. Explanation: Notes:
PHP
What is PHP?
PHP is a popular open-source scripting language primarily used for web development and creating dynamic content for websites. Here’s a brief overview: Here’s a simple example of PHP code: This script would output “Hello, World!” on the webpage when executed on a server with PHP installed. PHP has evolved over the years to support more […]
PHP
How to request an A record from a DNS server in PHP 8.3
In PHP 8.3, you can use the dns_get_record() function to query DNS records, including A records. Here’s an example of how to request an A record from a DNS server: Explanation: Example Output: If the domain has A records, the output will look like this:
PHP
How do I reverse an IP address for use in DNS BL?
Here’s a small function in PHP 8.3 that reverses an IPv4 address: Explanation: This ensures the function works safely and as expected.
Linux
Has Linux fixed the unix time bug yet?
The “Year 2038 problem” (also known as the 32-bit Unix time overflow bug) has largely been addressed in modern Linux systems and related software. So yes it has been fixed. Background on the Problem The issue arises because Unix time (the number of seconds since January 1, 1970, 00:00:00 UTC) is traditionally stored as a […]
Postfix
How do I block a domain name in postfix?
To block a domain name in Postfix, you can use the sender_access feature to reject emails from specific domains. Here’s a step-by-step guide: 1. Edit Postfix Configuration Open the main configuration file: Look for the smtpd_sender_restrictions line. If it doesn’t exist, add it, or modify it to include the check_sender_access directive: The permit ensures valid […]
PHP
Temperature conversions between Celsius and Fahrenheit using PHP.
Here’s an example of a PHP 8.2 class that handles temperature conversions between Celsius (C) and Fahrenheit (F): This class provides two static methods: The example usage demonstrates how to use the class to perform conversions. Let me know if you’d like to expand this functionality!
Wordpress
How to add a Google Form into a WordPress page.
To embed a Google Form into a WordPress page using HTML, follow these steps: 1. Get the Embed Code from Google Forms: 2. Edit Your WordPress Page: 3. Add the Embed Code: 4. Save and Publish: Example Embed Code. Here’s an example of what the embed code looks like: Customization. Additional Notes:. This method ensures […]
Dribble
ESPs: Why IP and Domain Reputation Matter and How to Manage Them
As an email service provider (ESP), your aim is to maintain a safe and trustworthy network for email senders (and their recipients) while ensuring they achieve high deliverability rates. A task that is no mean feat when you’re servicing a bank of customers with hundreds of thousands of IPs and domains – each with a […]
PHP
How to get country codes using the ODOO xmlrpc API and PHP.
To fetch country codes from an Odoo instance using PHP 8.2, you’ll need to use the Odoo XML-RPC API. Below is an example of how to achieve this: Step 1: Set Up PHP Environment Ensure you have PHP 8.2 installed with the necessary extensions, including the cURL extension, which is used for making HTTP requests. […]
PHP
Using PHP to turn an HTML table into an Array()
To convert an HTML table into a PHP array in PHP 8.2, you can use the DOMDocument class, which provides a structured way to parse and extract data from HTML. Here’s an example of how to achieve this: Example Code: Output: Explanation: This approach is flexible and can handle more complex HTML tables with nested […]
JavaScript
Adding Zeros to the front of a number in JavaScript.
To format a number to always have six characters, including leading zeros if necessary, you can use JavaScript’s padStart method. This method pads the current string with another string (repeated, if needed) until the resulting string reaches the desired length. Here’s a simple example of how to do this: Explanation: You can use this function […]
PHP
How to add a BCC to PHP mail() command.
To add BCC (Blind Carbon Copy) recipients when sending mail in PHP, you can modify the headers to include BCC recipients. Here’s how you can do it: Example using PHP mail() function: Explanation: This will send the email to the primary recipient and also BCC it to hidden1@example.com and hidden2@example.com. Considerations:
PHP
How to use Māori macrons in your PHP 8.3 code.
To convert UTF-8 characters with macrons (e.g., Māori macrons like “ā”, “ē”, etc.) into their corresponding HTML entity codes in PHP, you can use the mb_encode_numericentity() function from the mbstring extension. Here’s an example of how to achieve this: Example Code: Explanation: Example Input/Output: Notes: This approach will correctly convert the UTF-8 macron characters to […]
Linux
What are Load Averages?
Load averages represent the average number of processes that are either: They give a snapshot of how much work your system has been doing over time. Linux usually reports three numbers for load average, which represent the load over different periods: For example, when you run the uptime or top command, you might see something […]
Linux
[SOLVED] The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key
Here is the solution if you’ve got the following error message when updating package lists on Debian (apt-get update): The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key The sury.org Debian package repository has changed its package signing key. To fix the error, just download the new key: Finally, run package update again: […]
JavaScript
Change the Text of a Div Element using JavaScript
Use the textContent property to change the text of a div element, e.g. div.textContent = ‘Replacement text’. The textContent property will set the text of the div to the provided string, replacing any of the existing content. Here is the HTML for the examples in this article. index.html And here is the related JavaScript code. index.js We used the textContent property on the div to change its text […]
PHP
Validate Password Strength using PHP
When the user provides their account password, it is always recommended to validate the input. Password strength validation is very useful to check whether the password is strong. A strong password makes the user’s account secure and helps to prevent account hacking. Using Regex (Regular Expression), you can easily validate the password strength in PHP. […]
Linux
Backup a website using bash script.
I needed to complete a routine backup of my development websites on my home server. This was pretty easily completed by daily by a bash script. Here is a simple script that backs up the database and all the files. For the example below I’m using Maria DB 10.5 and my project files are located […]