PHP batch gets the checkbox value
1. Naming
2. Use
When the plan is used as part of the sql instruction: If the fields participating in the control are numerical, then
if(! empty($_POST[checkbox])) {
$expr = join(",", $_POST[checkbox]);
$sql = "select * from tbl_name where field in ( $expr)";
}
If the field participating in the control is numeric, then
if(! empty($_POST[checkbox])) {
$expr = "".join(",", $_POST[checkbox]).".";
$sql = "select * from tbl_name where field in ($expr)";
}
PHP determines whether the Form is submitted
$action=$HTTP_POST_VARS["Button1"];
if($action=="Submit")
{
//Perform form operation
}
else
{
//Read the default value
}
PHP Get the string length
strlen($myrow[1])
PHP Url redirection
Header("Location: ".$_SERVER["HTTP_REFERER"]);
PHP superglobal object
$a = 1;
$b = 2;
function Sum()
{
$GLOBALS["b"] = $GLOBALS["a "] + $GLOBALS["b"];
}
Sum();
echo $b;
?>
PHP form value
If mothod="get" use $_GET["test"] instead of $test
If mothod="post" use $_POST["test"] instead of $test
PHP gets the current IP
PHP Get the current time
echo date("Y-m-d G:i:s");
?>
date("Y year m month d day")
Date ("Y-n-j ")