Eight tips frequently used in PHP dynamic Website Development

8 tips commonly used in PHP dynamic website development. Read the 8 tips commonly used in PHP dynamic website development. This article summarizes the 8 tips commonly used in PHP daily development. PHP batch get the checkbox value 1, named inputtype = "> <LINKhref =" http://www.php100.com//statics/style/headfloor_950

This article summarizes eight tips commonly used in daily PHP development.
PHP batch obtains the maximum checkbox value

1. name

2. use

When the plan is considered as part of an SQL command: If the field involved in the control is numeric

If (! Empty ($ _ POST ['checkbox']) {
$ Expr = join (",", $ _ POST ['checkbox']);
$ SQL = "select * from tbl_name where field in ($ expr )";
}

If the field involved in the control is numeric

If (! Empty ($ _ POST ['checkbox']) {
$ Expr = "'". join ("', '", $ _ POST ['checkbox']). ".";
$ SQL = "select * from tbl_name where field in ($ expr )";
}

PHP checks whether the Form is submitted

$ Action = $ HTTP_POST_VARS ["Button1"];
If ($ action = "submit ")
{
// Execute the form operation
}
Else
{
// Read the default value
}

PHP obtains the string length

Strlen ($ myrow [1])

PHP Url redirection

Header ("Location:". $ _ SERVER ["HTTP_REFERER"]);

PHP Super global object

$ A = 1;
$ B = 2;
Function Sum ()
{
$ GLOBALS ["B"] = $ GLOBALS ["a"] + $ GLOBALS ["B"];
}
Sum ();
Echo $ B;
?>

PHP form value

If mothod = "get", replace $ _ GET ["test"] with $ test.
If mothod = "post", replace $ _ POST ["test"] with $ test.

PHP obtains the current IP address

PHP gets the current time

Echo date ("Y-m-d G: I: s ");
?>
Date ("Y, m, d ")
Date ("Y-n-j ")