CodePrimer
Search a living directory of web syntax. Pick a problem, copy a working sample, then adapt it.
PHP
Beginner
Read $_GET values
How do I read query string data?
PHP
Beginner
Read $_POST values
How do I read POST body fields?
PHP
Intermediate
Sanitize and validate input
How do I protect against XSS and bad emails?
PHP
Beginner
Read checkbox array in PHP
How do I read skills[] from a form?
PHP
Beginner
Detect GET vs POST in PHP
How do I know which HTTP method was used?