A detailed description of PHP writing format and example analysis

This article mainly introduces the PHP writing format detailed and the example analysis, the interest friend's reference, hoped to be helpful to everybody.

Start with an example.

Start the editor, create a php file, and type the following code:

<?php echo "Hello!" ";?>

Name the file test.php and store it in the e:html directory.

Access the PHP file in the browser address bar: http://127.0.0.1/test.php, the output is as follows:

How are you doing! In this example, we output a string with the echo command "Hello!" ”。

As you can see from this example:

php file or PHP snippet begins with "<?php" and ends with "?>" with PHP code in the middle

• Each instruction set to; End of symbol

• The browser gets the PHP parser after executing the PHP code results, the site viewer can not see the original PHP file code

Of course, to output the standard HTML code, the above example can be perfected as:

The PHP code can be seen to be mixed with XHTML code.

Echo is a PHP built-in instruction for outputting 1 or more strings, similar to echo and print.

Below we introduce the output function of PHP.

PHP Echo and Print statements

Echo and Print differences:

echo-can output one or more strings

print-allows only one string to be output, with a total of 1 return values

Tip: The echo output is faster than print, ECHO has no return value, and print has a return value of 1.

PHP Echo Statement

Echo is a language structure that can be used without parentheses or parentheses: Echo or Echo ().

1. Display string

The following example shows how to use the echo command to output a string (the string can contain HTML tags):

<?php echo "
2. Display variables

The following example shows how to use the echo command to output variables and strings.

<?php $txt 1= "Learn PHP"; $txt 2= "manongjc.com"; $cars =array ("Volvo", "BMW", "Toyota");  echo $txt 1; echo "<br>"; echo "Study PHP at $txt 2"; echo "My car is a {$cars [0]}";?>
PHP Print Statement

Print is also a language structure, you can use parentheses, or you can use no parentheses: Print or print ().

1. Display string

The following example shows how to use the Print command to output a string (the string can contain HTML tags):

<?php print "
2. Display variables

The following example shows how to use the Print command to output variables and strings:

<?php $txt 1= "Learn PHP"; $txt 2= "manongjc.com"; $cars =array ("Volvo", "BMW", "Toyota");  Print $txt 1; print "<br>"; Print "Study PHP at $txt 2"; Print "My car is a {$cars [0]}";?>
Summary: The above is the entire content of this article, I hope to be able to help you learn.