PHP Tutorial Variable

Basic

1. Add an integer and string to produce integer in PHP
2. Assign variable by reference in PHP
3. Assign variables with variable in PHP
4. Create a variable and use in computation in PHP

Type

1. Check if a value is finite or not in PHP
2. Check if a value is not a number in PHP
3. Check if a variable is NULL in PHP
4. Check if a variable is a boolean in PHP
5. Check if a variable is a number or a numeric string in PHP
6. Check if a variable is a resource in PHP
7. Check if a variable is a scalar in PHP
8. Check if a variable is an array in PHP
9. Check if a variable is an object in PHP
10. Check if a variable is array or integer or numeric in PHP
11. Check if an input is a float number in PHP
12. Check if the type of a variable is string in PHP
13. Find whether the type of a variable is integer in PHP
14. Get the type of a variable with gettype() in PHP

Reference

1. Get variable address in PHP
2. Use indirect variable reference in PHP