PHP Learning Notes

1. globalKeywords are used to access global variables within functions.
   PHP also stores all global variables in an array named $GLOBALS [index]. The subscript is the variable name.
   This array is also accessible within the function and can be used to update global variables directly.

2. staticKeywords are used for situations where a local variable is not required to be deleted.

3. echoand print the difference between:
   · Echo: Capable of outputting more than one string
   · Print: Only one string is output and always returns 1
   · Echo is slightly faster than print because it does not return any values.

4. var_dump()Returns the data type and value of the variable

   $cars=array("Volvo","BMW","SAAB");echo "My car is a {$cars[0]}";var_dump($cars);array(3) { [0]=> string(5) "Volvo" [1]=> string(3) "BMW" [2]=> string(4) "SAAB" }

PHP Learning Notes