我有一个带有函数date:的类Convert
<?php
class Convert{
public static function datum($timestamp = time()){
//When $timestamp isn't set use php function time()
return(date("N" , $timestamp));
}
}
?>
//run method
Convert::datum();
这不起作用我得到了一个错误：Parse error: syntax error, unexpected '(', expecting ')' in .... on line 3 (function line)
功能时间似乎没有重新配置。
更改
class Convert{
public static function datum($timestamp = time()){ // <-- no functions allowed in here
//When $timestamp isn't set use php function time()
return(date("N" , $timestamp));
}
}
进入
class Convert{
public static function datum($timestamp = NULL){
//When $timestamp isn't set use php function time()
$timestamp = ($timestamp !== NULL ? $timestamp : time());
return(date("N" , $timestamp));
}
}
在声明函数时，参数只能接受空数据类型或数据。参数不能设置为接受函数的返回，也不能是动态的。
良好
public static function datum($timestamp = NULL){
public static function datum($timestamp = 13524564){
public static function datum($timestamp = '423432'){
public static function datum($timestamp = array()){
public static function datum($timestamp = FALSE){
public static function datum($timestamp = TRUE){
错误
public static function datum($timestamp = time()){
public static function datum($timestamp = (8*2)){
public static function datum($timestamp = $this->someValFromThisClass){
public static function datum($timestamp = 123, $new = $timestamp){