PHP dynamic website development tips _ PHP Tutorial

Tips for PHP dynamic Website Development. Many programmers are using 1. naming inputtypecheckboxnamecheckbox [] value $ dwmyrow [banzhu] 2. when using a plan as part of an SQL command: If many programmers are using 1. name

1. <Input
2. Type = 'checkbox'
3. Name = 'checkbox []'
4. Value = $ dwmyrow [banzhu]
5. />

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 PHP dynamic website development says that the field involved in 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 dynamic website development PHP get string length

 
 

  
  
strlen($myrow[1]) 
 
 

PHP Url redirection

 
 

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

Super global object in PHP dynamic Website Development

 
 

  
  
< ?php 
  
  
$a = 1; 
  
  
$b = 2; 
  
  
function Sum() 
  
  
{ 
  
  
　$GLOBALS["b"] = 
$GLOBALS["a"] + $GLOBALS["b"]; 
  
  
} 
  
  
Sum(); 
  
  
echo $b; 
  
  
?> 
 
 

PHP form value

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

Obtain the current IP address when developing a PHP dynamic website

 
 

  
  
 
  
  
=$HTTP_SERVER_VARS["REMOTE_ADDR"]
  
  
?> 
 
 

PHP gets the current time

 
 

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

The above is a detailed explanation of PHP dynamic website development skills.

Example 1: name input type = 'checkbox' name = 'checkbox [] 'value = $ dwmyrow [banzhu]/2. when a plan is used as part of an SQL command: if you participate in the control...