php
Undefined variable used
Undefined variable.*\$
Fixes
- 1.Initialize the variable before use
- 2.Check for typos in the variable name
- 3.Use isset() or null coalescing: $var ?? 'default'
- 4.Verify variable scope — variables inside functions aren't global
variableundefined
Related Errors
php4 fixes
PHP class not found
Class ['"].*['"] not found
- •Run composer dump-autoload to regenerate autoload files
- •Check namespace matches directory structure (PSR-4)
php3 fixes
Database table does not exist
SQLSTATE\[42S02\].*Table.*doesn't exist
- •Run php artisan migrate to create the table
- •Check table name in migration matches what the model expects
php4 fixes
Duplicate key constraint violation
SQLSTATE\[23000\].*Integrity constraint violation.*Duplicate entry
- •Use firstOrCreate() or updateOrCreate() instead of create()
- •Add unique validation rule before saving