unset

Transferred from: http://blog.csdn.net/mcpang/article/details/7752736For documents that are updated in addition to replacements, only partial updates to one or more documents are required to use the atom's update modifier to efficiently document

How to solve the PHPcode & lt; error when using unset ;? Phpob_start (ob_gzhandler); session_save_path (2; D: sessionFilesessionFile); @ session_start (); how to solve the error when unset () is used PHP code ", $user); unset($user)

How to solve the PHPcode & lt; error when using unset ;? Phpob_start ('OB _ gzhandler '); session_save_path ('2; D:/sessionFile'); how to solve the error when unset () is used PHP code ", $user); unset($user); printf("Username

  This article is mainly in PHP isset () and unset () the use of the function of a detailed introduction, the need for friends can come to the reference, I hope to help you. Isset (PHP 3, PHP 4, PHP 5) Isset--detect variables are set describe

For documents that are updated in addition to replacements, only partial updates to one or more documents are required to use the atom's update modifier to efficiently document updates. The update modifier is a special key in theUsed to specify

First, let's look at an example: The code is as follows Copy Code $a = "Hello Springload";$b = $a;Unset ($b);echo $a; Hello Springload?> This is clear to us, unset ($b), just disconnected the variable name and

Differences between unset and array_splice in PHP to delete elements in an array It is very simple to delete array elements in php. However, sometimes we need to sort indexes to delete arrays. We will use related functions. Here we will introduce

is_null, Empty, isset, unset Let's take a look at the descriptions of these 4 functions first. Isset to determine if a variable already exists (config)unset Delete (release) the variableEmpty to determine if the variable is nullIs_null to

$var = "; The result is true, so the text behind will be printed. if (Isset ($var)) { Print "This var was set set so I'll print."; } In the example below, we will use Var_dump to output the return value of Isset ().

$ Array = array ('a' => 1, 'BB '=> 2 );Function delete (& $ array, $ key){If (! Is_array ($ key )){$ Key = array ($ key ); }Foreach ($ key as $ k ){Unset ($ array [$ k]); }$ Array = array_values ($ array );}Print_r (array_values ($ array ));Print_r (

Unset (mixed var [, mixed var [,...])Unset () destroys the specified variable. Note that in php Tutorial 3, unset () will return true (actually an integer value of 1), while in php 4, unset () is no longer a real function: it is now a statement. In

How to resolve errors that occur when using unset () PHP Code ", $user); Unset ($user); printf ("Username now set to:%s", $user);? > Why unset () shows notice:undefined variable:user in D:\Apache

This article describes how php uses unset () to delete a unit (key) in an array. The example shows how to use the unset function to delete an array unit, for more information, see This article describes how php uses unset () to delete a unit (key)

The actual effect of PHP's unset () functionIt's highly recommended that you share this technical article PHP variable to memory overhead and release, whether Unset () really frees memory. Turn from: The actual effect of PHP's unset () function The

Introduction: This is a detailed page of PHP unset () details, introduced and Php,unset, PHP php unset () detailed knowledge, skills, experience, and some PHP source code and so on. class= ' pingjiaf ' frameborder= ' 0 ' src= '

unset$AA = 10;Unset ($AA);if (Isset ($AA)){echo "AAA";}else {echo "BB";}$aar = Array ("1", "2", "3");Unset ($aar [2]);$aar = Array ("1", "2", "3");Unset ($aar [1]);if (Isset ($aar [1])){echo "AAA";}else {echo "BB";}Print_r ($aar)------Bbbbarray ([0]

Deletes the specified array subscript element We use the unset function to implement, under look at the unset syntaxvoid unset (mixed var [, mixed Var [, ...]]) Unset () destroys the specified variable. Note in PHP Tutorial 3, unset () will return

For documents that are updated in addition to replacements, only partial updates to one or more documents are required to use the atom's update modifier to efficiently document updates. The update modifier is a special key in theUsed to specify

This article describes the differences among is_null, empty, isset, and unset in php. For more information, see Is_null, empty, isset, and unset. let's take a look at the descriptions of these four functions. Isset determines whether a variable

Differences between unset () and null when deleting variables in PHP. The first method is $ varnamenull. The second method is unset ($ varname). both methods can delete variables, but the results are slightly different. Code: Copy the code as