In this tutorial we have to learn about PHP FILTER.The PHP filters is used to sanitize and validate external data with example code. PHP filter has useful extensions which used to check user input and designed in a way to make validation quite easy and faster.
For upcoming tutorials we have to learned about PHP Filter functions :
| Function | Description |
|---|---|
| filter_has_var() | Checks whether a variable of a specified input type exist |
| filter_id() | Returns the filter ID of a specified filter name |
| filter_input() | Gets an external variable (e.g. from form input) and optionally filters it |
| filter_input_array() | Gets external variables (e.g. from form input) and optionally filters them |
| filter_list() | Returns a list of all supported filter names |
| filter_var() | Filters a variable with a specified filter |
| filter_var_array() | Gets multiple variables and filter them |