Fixing AWS S3 Error: A conflicting conditional operation is currently in progress against this resource.

In AWS S3, when creating a bucket, you may sometimes encounter an error as “A conflicting conditional operation is currently in progress against this resource”. This error typically occurs when you’re trying to perform an action on a resource that is currently undergoing a different conditional operation. This is common in distributed systems like Amazon… Read More Fixing AWS S3 Error: A conflicting conditional operation is currently in progress against this resource.

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Implementing Zoom Webhook Validation in PHP

When integrating Zoom webhooks into your application, it’s crucial to ensure that the incoming webhook requests are indeed from Zoom. This is where webhook validation comes into play. In PHP, validating a Zoom webhook involves a few key steps which, when implemented correctly, secure your application by verifying that the source of the requests is… Read More Implementing Zoom Webhook Validation in PHP

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Steps to install Wkhtmltopdf 0.12.3 on Linux AWS EC2

wkhtmltopdf and wkhtmltoimage are open source (LGPLv3) command line tools to render HTML into PDF and various image formats using the Qt WebKit rendering engine. These run entirely “headless” and do not require a display or display service. Here are the steps we need to be flollowed in order to install wkhtmltopdf. Login to your… Read More Steps to install Wkhtmltopdf 0.12.3 on Linux AWS EC2

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call_user_func() expects perameter 1 to be a valid callback, function ‘your callback function’ not found-Jpgraph Codeigniter

call_user_func — Call the callback given by the first parameter. Syntax: mixed call_user_func ( callable $callback [, mixed $parameter [, mixed $… ]] ) Calls the callback given by the first parameter and passes the remaining parameters as arguments. callback The callable to be called. parameter Zero or more parameters to be passed to the… Read More call_user_func() expects perameter 1 to be a valid callback, function ‘your callback function’ not found-Jpgraph Codeigniter

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Codeigniter: Commands out of sync; you can’t run this command now

Commands out of sync If you get Commands out of sync; you can’t run this command now in your client code, you are calling client functions in the wrong order. This can happen, for example, if you are using mysql_use_result() and try to execute a new query before you have called mysql_free_result(). It can also… Read More Codeigniter: Commands out of sync; you can’t run this command now

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Solving “Unknown MySQL server host” in AWS RDS

Every once and a while when your application connects to Amazon RDS you get the error “Unknown MySQL server host”. We have around 100 connections per second and the problem occurs typically 1-10 times per day. What causes the problem? The problem is caused by the internal name servers in AWS. Instead of always returning… Read More Solving “Unknown MySQL server host” in AWS RDS

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