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CSS Container Queries: Responsive Components by Their Own Size

PHP cURL Error 28: Find Where the Request Times Out

Verify a Downloaded File with SHA-256 on Windows and Linux

A Website Opens on Other Devices but Not One Computer

Changed PHP in cPanel but the Old Version Still Runs?

WHM Apache Status Fails While Apache Is Running: What to Check

Linux Server Performance: Measure Before Tuning

Nginx and Apache Security: Review the Whole Request Path

GitLab Updated but Still Vulnerable? The Alpine Incident and Ruby Checks

Is Logrotate Working? Check Scheduling, Rotation and the Active Log

PDO MySQL SQLSTATE[HY000] [2002]: Socket or Connection? Image

PHP PDO MySQL SQLSTATE[HY000] [2002]: Socket or Connection?

When PDO reports SQLSTATE[HY000] [2002], changing the database password is not the first test to run. The PHP process may be unable to reach MySQL ove...

PHP Headers Already Sent: Find the First Output Image

PHP PHP Headers Already Sent: Find the First Output

You call header() to redirect a request, but the browser stays on the old page—or PHP refuses to set a cookie. A headers already sent warning usually ...

PHP 8.2, 8.3, 8.4 or 8.5: Which Version Should You Choose? Image

PHP PHP 8.2, 8.3, 8.4 or 8.5: Which Version Should You Choose?

Your hosting panel offers PHP 8.2, 8.3, 8.4 and 8.5. Which one should you pick? The highest number is easy to spot. The useful choice is the one your ...

PHP Windows Brotli Update: Same Runtime, Rebuilt Package Image

Cyber Security PHP Windows Brotli Update: Same Runtime, Rebuilt Package

A new Windows PHP package appears, yet its interpreter reports the same PHP version as yesterday. That can be a real security update. This time the pa...

PHP Allowed Memory Size Exhausted: Diagnose Before Raising the Limit Image

PHP PHP Allowed Memory Size Exhausted: Diagnose Before Raising the Limit

Allowed memory size exhausted means a PHP request exceeded its configured memory limit. It does not, by itself, prove that the server has run out of R...

Deleted a Linux Log but Disk Space Is Still Full? Find the Open File Image

Linux Deleted a Linux Log but Disk Space Is Still Full? Find the Open File

You deleted a large log, the directory became smaller, but df -h still reports a full filesystem. Before deleting anything else, check whether a runni...

MySQL Error 1040 Too Many Connections: Check Before Raising the Limit Image

Databases MySQL Error 1040 Too Many Connections: Check Before Raising the Limit

The site works for a while, then requests start failing with SQLSTATE[HY000] [1040] Too many connections. Raising max_connections is an easy suggestio...

Does Changing the SSH Port Improve Security? Image

Cyber Security Does Changing the SSH Port Improve Security?

Moving SSH from its default port can reduce routine connection attempts in logs. It does not make the service invisible, and it does not stop a target...

Secure PHP Logout and Revoke Sessions Across Devices Image

PHP Secure PHP Logout and Revoke Sessions Across Devices

Logging out should make the current browser stop presenting an authenticated session. Clearing a page variable is not enough: the server-side session ...

PHP Email Activation: Verify Addresses with Expiring Tokens Image

PHP PHP Email Activation: Verify Addresses with Expiring Tokens

Email activation can confirm that a person can receive mail at an address, but it does not prove a legal identity. Treat the activation link as a temp...

Firebase Review: Managed Backend Services and Design Tradeoffs Image

Reviews Firebase Review: Managed Backend Services and Design Tradeoffs

Firebase provides managed services that can help a team build an application without operating every backend component itself. Depending on the produc...

Cyber Incident Response: Contain, Investigate and Recover Image

Cyber Security Cyber Incident Response: Contain, Investigate and Recover

During a cyber incident, teams face pressure to restore service quickly. Actions taken in the first minutes can affect whether the attacker remains ac...