Linux timestamp is a number of seconds from the Epoch of Linux, large number of seconds. When you are counting the time interval between 2 times or 2 dates, the result is usually in seconds as well. Understandably, it’s everything but user friendly to just present the number of seconds to the users, e.g. 153297 …
Often we need the users to enter a valid string of date or time in the form. But how do you validate the strings with regular expressions? In PHP, you can use these functions and regular expressions. RegExp and function to validate against date string: // Default: YYYY-MM-DD function isDate($subject, $separator = ‘-‘) { return …
When I’m developing the online form creator that enables the users to create form fields that accept only certain type of numbers, I need to verify if a given string is a valid natural number such as 1, 2, 3, 4, …. I’m writing the code / functions in PHP but you can literally use …
The strange thing is that the native empty() function of PHP treats a string of ‘0’ as empty: $str = ‘0’; echo empty($str) ? ’empty’ : ‘non-empty’; And it will output ’empty’. Therefore if you need to examine if a string is truly an empty string with zero length, you have to use: echo strlen($str) …
PHP: True empty() function to check if a string is empty or zero in length Read More »
A not-so-commonly employed content strategy is to automatically generate custom content by user searches. For example, if you’ve got a popular blog, there will be a lot of users searching for things they want to find on your blog. It’s an obvious sign that they want you to write about them. While you are recommended …
I created a free online web form builder a while back and since it went well in search engine rankings, spammers and phishers found it and started to use it creating forms to collect email account usernames and passwords through phishing attempts. I’ve got to do something before my host closes down my site because …
PHP: Checking Text Strings against Reserved or Censored Words Read More »
Had a bunch of .info, .net and .org to be renewed yesterday and after searching for quite a while, I was unable to find any promo source code deals better than this one: gdbb776 It places a 17% discount ($6.99 .info, $7.49 .org and .net) off your cart for domain renewals. I had 17 domains …
Best renewal promo code for non .com domains at GoDaddy Read More »
The easy way to add a username and password pair in the .htpasswd file is to use an online password generator tool that converts the clear text password into its hash, a.k.a. the encrypted password. The problem with this approach is that you have to manually create the pair and append it to .htpasswd. Is …
How to create / generate .htpasswd password with PHP dynamically? Read More »
Depending on the web server software you use, your PHP script will be consuming significantly different amount of memory (RAM). If you are using Apache without proper optimization, the simplest request that does nothing but returns a status code will need 150kB of memory. Multiply this by 2000 visits per day and by 10 sites …
Check how much memory your PHP script is using. (PHP script memory usage) Read More »
If you accepted GoDaddy’s offer of the first-year-free private registration service for your domain, you would not be so happy when you are renewing the domain for more years because you will find the private registration is bound to that domain. You can either renew the domain WITH the private registration which costs an extra …
Shady GoDaddy: How to cancel private registration for your domain renewals? Read More »
There are primarily 2 ways for merchants to set up an affiliate program, one is to offer coupons that are assigned to the affiliates and can be spread out. When someone uses that coupon, the merchant knows it’s a referral by that affiliate. The other is to create dedicated links with the affiliate ID in …
How to hide and force the visitor to click your referral or affiliate link? Read More »
MilitaryFictionBooks.com is actually an old domain, I registered it over a year ago and parked it ever since with a custom page of my own. It has been indexed in Google for 1 year. So what you are seeing now may very probably not happen for you if you just registered a fresh domain name. …
MilitaryFictionBooks.com and StandingDesk.org Status Report Read More »
Go to Amazon.com: http://www.amazon.com There are tens of thousands of different affiliate programs out there you can use to monetize your traffic. A few of the biggest players are ClickBank, eBay, Amazon, CJ and Google Affiliate Network. Unlike CJ and Google Affiliate Network who are simply brokers of merchants and affiliates, Amazon and eBay are independent …
Amazon Associate (Affiliate) Program Review: Why I love them Read More »
Update: Here’s the latest coupon code of Godaddy – $1.49 / year .com God knows why they have raised the .org registration fee to $14.99. I don’t know if it’s temporary or just the way it will be for a long time to come but it’s outrageous. Fortunately I have found this .org domain registration …
Godaddy $7.69 .org domain registration coupon promo code Read More »
When you read the content of any specified directory with PHP functions such as scandir() or readdir(), they will return both files and directories. How does one get just the child directories of a given directory in PHP? The obvious solution is the is_dir() function that checks if a filename is a directory: $all = …
How to get all the sub-directories of a given directory in PHP? Read More »
If you have mysqli extension installed with PHP and you use it to perform database operations, after you have tried to connect to MySQL by: $conn = new mysqli(‘localhost’, ‘db_user’, ‘db_pwd’, ‘db_name’); You can then check if the connection is successful by: if ($conn -> connect_errno) { // failure } else { // success } …
How to check if a MySQL database connection is successful in PHP? Read More »
When I was creating an installation script, I needed to check if a table exists to make sure the installation had not been performed yet. How did I do that? I use this simple query to get whether a table exists in the specified database: SELECT table_name FROM information_schema.tables WHERE table_schema = ‘db_name’ AND table_name …
Edit: Forgot all the website advertising revenues other than AdSense. Added it. So I thought I should start writing things that are more personal and interesting. I ended up with this crazy idea — posting about my online income. People always want to know how much people make online, and more importantly, how they have …
This is a pretty odd question to ask in the first place if you have been using JavaScript for a while. JavaScript files are called from HTML web pages who need them to manipulate the HTML elements so that the users have extraordinary interactive experience. You can’t include a JavaScript file inside another JavaScript file …
How to include a JavaScript file inside a JavaScript file? Read More »
Normally, when users click on any label tag with the cursor, the corresponding input field will be focused ready for input or selection. Therefore, you can always achieve the focus effect by this native function of HTML’s. Otherwise, you’d need a small dime of JavaScript to set focus to any form element on the fly …
