CodePrimer
Search a living directory of web syntax. Pick a problem, copy a working sample, then adapt it.
PHP
Beginner
Embed PHP inside HTML
How do I mix PHP and HTML?
PHP
Beginner
PHP comments
How do I write comments in PHP?
PHP
Beginner
PHP variable rules
What are the rules for PHP variables?
PHP
Beginner
echo vs print
Should I use echo or print?
PHP
Beginner
PHP scalar data types
What data types does PHP have?
PHP
Beginner
Common PHP string functions
How do I count, reverse, or replace text?
PHP
Beginner
PHP math helpers
How do I do min/max/round/random in PHP?
PHP
Beginner
PHP type casting
How do I cast a value to another type?
PHP
Beginner
PHP arithmetic operators
What are PHP math operators?
PHP
Beginner
PHP comparison operators
What is == vs === in PHP?
PHP
Beginner
PHP logical operators
How do I combine conditions?
PHP
Beginner
Combined assignment operators
What does += mean in PHP?
PHP
Intermediate
Local vs global scope
Why can’t my function see an outside variable?
PHP
Intermediate
Static variable in a function
How do I keep a value between function calls?
PHP
Beginner
if / elseif / else
How do I branch logic in PHP?
PHP
Beginner
Ternary and ??
How do I assign with a short conditional?
PHP
Beginner
switch statement
How do I handle many discrete cases?
PHP
Beginner
while loop
How do I loop while a condition is true?