stay tonya mitchell uses static code to realize the color display of tables in alternate rows

In actual programming applications, we often forget the function of STATIC. Reflect carefully. . :)
We use PHP to query data from the database and output the results to the browser. If the results have many rows and the bgcolor of the table is all monochrome, the viewer will feel uncomfortable. So how to make the colors of each row of the table different?
Please see below:

Copy the code The code is as follows:

function getcolor()
{
static $colorvalue;//Define a static variable
if($colorvalue=="#ffffff")
$ colorvalue="#000000";
else $colorvalue="#ffffff";
return($colorvalue);
}
print("

n");//The following outputs 10 lines
for( $i=0;$i<10;$i++)
{ $bcolor=getcolor();//Change the background color
print("n");
print("n");
print("");
}
print("n");
?>

Instructions:
This program A static variable static $colorvalue is defined in , which means that after the function call is completed,
This variable $colorvalue still retains its value and does not disappear. When the getcolor() function is called again, the value of the variable $colorvalue is the value of $colorvalue at the end of the last function call.​

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