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8 tips commonly used in PHP development_PHP tutorial
- WBOYOriginal
- 2016-07-21 15:49:47742browse
PHP batch gets the value of checkbox
1. Name
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 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)";
}
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 redirect
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 method="get", use $_GET["test"] Replace $test
If method="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")