A small example of how to specify a default value for a php function_PHP Tutorial

Content of this section:
Specify default values ​​for PHP functions
In PHP programming, set default values ​​for custom functions. When the user calls the function, if no value is specified for the parameters, the parameters will use the default values. Value replacement.
Example 1,

Copy code The code is as follows:

function printMe($ param = NULL)
{
print $param;
}
printMe("This is test");
printMe();
?>
body>

Output result:
This is test
Example 2, example of using default values ​​of php function parameters, setting and using default values ​​in php function parameters.
Code:

Copy code The code is as follows:

function textonweb ($content , $fontsize=3){
echo "$content";
}
textonweb ("A
", 7);
textonweb ("AA.
");
textonweb ("AAA.
");
textonweb ("AAAA!
") ;
?>

http://www.bkjia.com/PHPjc/621698.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/621698.htmlTechArticleContents in this section: Specify default values ​​for php functions In php programming, set default values ​​for custom functions. When the user calls this function, if no value is specified for the parameter, the parameter will be replaced with the default value...