PHP Study Cards
Click any card to reveal the answer
Click any card to reveal the answer
Use opening tag <?php
Use dollar sign followed by variable name like $variable
Use the dot operator like $str1 . $str2
Use array() function or square brackets like $arr = [1 2 3]
Use square brackets with index like $arr[0]
Use key-value pairs like $arr = ['key' => 'value']
Use include or require statements
require stops execution if file not found include continues with warning
Use function keyword like function myFunction() {}
Use function name followed by parentheses like myFunction()
Use class keyword like class MyClass {}
Use new keyword like $obj = new MyClass()
Use arrow operator like $obj->property
Use define() function or const keyword
Use try-catch blocks or error handling functions
Use mysqli_connect() or PDO
Use mysqli_query() or PDO prepare and execute methods
Use $_POST $_GET or $_REQUEST superglobals
Use session_start() function
Use $_SESSION superglobal like $_SESSION['key'] = 'value'
Use header() function like header('Location: page.php')
Use filter_var() with FILTER_VALIDATE_EMAIL
Use password_hash() function
Use password_verify() function
Use date() function with format strings
Use $_FILES superglobal and move_uploaded_file()
Use file_get_contents() or fread() functions
Use file_put_contents() or fwrite() functions
Use json_decode() to convert JSON to PHP arrays or objects
Use json_encode() to convert PHP data to JSON format
Remember: Use all available resources to study. Flearn alone cannot guarantee success in any exams—make sure to supplement your learning!