Web Development

When filter_input() returns NULL, it is tempting to treat the value as an empty string or a failed validation. Those are different states. A missing i...

cURL error 60 means certificate verification failed during a connection. In WordPress it may appear while contacting an update service, payment provid...

A file extension tells you what a file is intended to contain; it does not tell you whether the export is suitable for your website. A tiny PNG can be...

A small HTML table does not need a search library. Read the search field, compare it with the loaded rows and hide rows that do not match. The importa...

Tabs let related sections share the same area of a page. They work well for short alternatives such as an overview, installation notes and examples. T...

A modal is useful when a short task needs the reader's attention without leaving the page. A dark overlay alone does not make a component modal: keybo...

PHP's built-in functions can reduce repetitive code, but misreading a return value introduces new bugs. Distinguish validation from sanitization, and ...

Do not choose a form control only by its appearance. Decide whether the user should send one value, a longer explanation, or one of a fixed set of opt...

Choose between Flexbox and Grid by asking how items should align, not which feature is newer. Content widths often drive a button group; a card list m...

If a page looks fine on a desktop but shows tiny text or horizontal scrolling on a phone, separate two problems: the browser's viewport and the CSS la...