php destroy variable

Analysis of variable reference and destruction mechanism in PHP, and destruction of php. Analysis of variable reference and destruction mechanism in PHP. php destruction examples in this article analyze the variable reference and destruction

We are learning The PHP unset () function is used to destroy variables, but most of the time, the function only destroys the variable, and the value of the variable stored in the memory is still not destroyed, that is, it does not achieve the

The PHPunset () function destroys the variable. We are learning that the PHPunset () function is used to destroy Variables. However, many times, this function only destroys the variables, and the values of the variables stored in the memory are

Analysis of variable reference and variable destruction mechanism in PHP, PHP destruction This paper analyzes the variable reference and the mechanism of variable destruction in PHP. Share to everyone for your reference. The specific analysis is as

In this paper, we analyze the mechanism of variable reference and variable destruction in PHP. Share to everyone for your reference. The specific analysis is as follows: Variable is a very important type in PHP, we have data through variables or

Phpunset () destroys one or more variables. The unset function is a built-in function for php to destroy variables. we have introduced how to use unset to destroy static variables and global variables. at the same time, we can destroy array

In PHP, the symbol "&" represents a reference. 1, see what does not refer to this: $a   = "Hello world";//define a variable, the following assignment to $b $b = $a;//This step does not precede $a with a symbol Like this "$b = & $a". No Plus, in

foreach ($tags as $value) { if (Isset ($alls [$value [' username ']]) {$m =memory_get_usage () Unset ($alls [$value [' username ']]; Unset ($value); }else{ $alls [$value [' username ']] = $value; }}Look at the code:

PHP variable definition, variable, variable reference, and destruction method. Copy the code as follows :? Php $ longbig_long_variable_name; $ longPHP; * Use a string stored in the variable $ long as the variable name of the new variable, equivalent

Php Tutorial: How to Destroy unset with variableUnset -- release the specified variableDescriptionVoid unset (mixed var [, mixed var [,...])Unset () destroys the specified variable. Note that in PHP 3, unset () will return TRUE (actually an integer