PHP: Learning Notes (2)--Basic syntax

PHP: Learning Notes (2)--basic syntax output instructions to the screen

1.void Echo ( string $arg1 [, string $... ])

2.int Print ( string $arg )

Note:

1.echo, print is not actually a function (it is a language structure), So you don't have to use parentheses to enclose its argument list.  

2. You need to use double quotes when outputting variables!

3.int printf (string $format [, mixed Code class= "parameter" > $args [, mixed $... ]] )

< Span class= "type" >4.string sprintf (string $format [, mixed $ Args [, mixed $ ... ])

Description

1.sprintf, returns the string generated based on the formatted string format.

2.printf , outputs a formatted string and returns the length of the string.

The 3.printf can be output directly from the browser, and sprintf needs echo to output it.

About formatting strings

Identifiers and variables

PHP: Learning Notes (2)--Basic syntax