## Example

`

     int extract ( array &$var_array [, int $extract_type = EXTR_OVERWRITE [, string $prefix ]] )

`

## Description

Import variables from an array into the current symbol table. Checks each key to see whether it has a valid variable name. It also checks for collisions with existing variables in the symbol table.

## Return Values

Returns the number of variables successfully imported into the symbol table.