Home Naming Conventions in PHP

Variable Names

Give variables descriptive names, such as $first_name or $homework_score.

Avoid single-letter variable names like $xor c, except for loop variables like $i.

Letter-Casing and Special Characters

Name variables and functions in lowercase, with underscores to separate words, such as $ostrich_count or compute_student_grade. Constants should be defined in all uppercase $LIKE_THIS.