我试图在构造函数中使用匿名函数,将其分配给公共变量,然后在方法中使用该变量。
我的班级
class siteAnalytics {
public $db_count; // FUNCTION "$db_count" - CALLED FROM "FUNCTIONS.PHP"
public $db_sum; // FUNCTION "$db_sum" - CALLED FROM "FUNCTIONS.PHP"
public $db_readAll; // FUNCTION "$db_readAll" - CALLED FROM "FUNCTIONS.PHP"
public function __construct($db_count, $db_sum, $db_readAll) {
$this->db_count = $db_count;
$this->db_sum = $db_sum;
$this->db_readAll = $db_readAll;
}
public function siteData(){
// CREATE "SITE DATA" ARRAY FROM QUERIES
$SD_array = array(
'U_active' => $this->db_count("users", "*", "WHERE a_status='true'"),
);
}
}
召集课堂
$siteAnalytics = new siteAnalytics($db_count, $db_sum, $db_readAll);
print_r($siteAnalytics->siteData());
怎么了?
未捕获的错误:调用未定义的方法siteAnalytics :: db_count()
我在调用siteData()
的数组中的$this->db_count
方法中收到错误!
我知道我可以通过方法传递匿名函数,但是为什么在通过构造函数时匿名函数不起作用。
答案 0 :(得分:2)
您可以尝试将属性分配给局部变量,然后像调用函数一样调用它:
public function siteData(){
$db_count = $this->db_count;
// CREATE "SITE DATA" ARRAY FROM QUERIES
$SD_array = array(
'U_active' => $db_count("users", "*", "WHERE a_status='true'"),
);
}
更新: 您可以尝试使用一对括号将检索到的属性括起来:
public function siteData(){
// CREATE "SITE DATA" ARRAY FROM QUERIES
$SD_array = array(
'U_active' => ($this->db_count)("users", "*", "WHERE a_status='true'"),
);
}