Question

$attacks_list = array();

function f1()
{     
    $sql = "SELECT * FROM user_pokemon_db WHERE user_id = '".$id."' AND pkmn_id = '".$pkmn_id."' " or die(mysql_error());
    $res = mysql_query($sql);
    $$attacks_list = mysql_result($res,0,"attacks");
    $attacks_list = unserialize($attacks_list);
    print_r($attacks_list);
 }

我已经全局声明了这个数组..但是它仍然无法识别它！有没有其他方法可以全局声明它？

Answer 1

如果您希望在函数中使用全局函数，则必须将其声明为函数级别的全局函数，例如

$attacks_list = array();

function f1()
{     
    global $attacks_list; // <-- ADDED
    $sql = "SELECT * FROM user_pokemon_db WHERE user_id = '".$id."' AND pkmn_id = '".$pkmn_id."' " or die(mysql_error());
    $res = mysql_query($sql);
    $$attacks_list = mysql_result($res,0,"attacks");
    $attacks_list = unserialize($attacks_list);
    print_r($attacks_list);
 }

有关更多信息，请查看关于变量范围的php.net文章：http://www.php.net/manual/en/language.variables.scope.php

未定义的数组变量

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