Process-oriented 2-----PHP

PHP is run on the server side, JS is running on the client's

PHP is a scripting language

<body>

<?php

echo "This is simple PHP, it's too simple, don't forget to add semicolons";

?>

</body>

PHP can do anything other CGI programs can do, such as collecting form data, generating dynamic Web pages, sending and receiving cookies.

PHP scripts are primarily used in three areas: server-side scripting, command-line scripting, desktop applications

hello.php

<body>

<?php

echo "<p>dddddddd</p>";

?>

</body>

You do not have to specify a variable's data type when defining a variable in PHP, there are 8 types of data in PHP: 4 scalar types, 2 composite types, 2 special types

Boolean,integer,float,string Array,object Resourse,null

<?php

$a _boolean=true;

$a _int=12;

$a _float=3.14;

$a _string= "DDDADAFDFD";

Echo GetType ($a _boolean);

Echo GetType ($a _int);

if (Is_int ($a _string))

{

echo "This is a string";

}

?>

Else

{

echo "This is not a string";

}

<?php

$a = 110;

$b =& $a;

?>

PHP provides a number of predefined variables

Include ' B.inc ';

Arithmetic operator, logical operator, assignment operator, bitwise operator, comparison operator, error control operator, execute operator, increment decrement, string, array, type operator

Instanceof:var_dump ($a instanceof MyClass);

If Else

Alternative syntax for Process Control

Process-oriented 2-----PHP