Warning: Call-time pass-by-reference has been deprecated解决方法
来源:互联网 发布:js返回true false 编辑:程序博客网 时间:2024/05/14 20:33
/*
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of getimagesize(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. ind:\vhost\include\inc_custom_fields.php on line178
*/
我把php.ini的display_errors = on改成display_errors = off // (不显示错误)
就不显示了。
虽然没有什么影响。但是心里还是有个疙瘩。。。
百度上没有找到什么答案,然后在google上 找到了。
修改php.ini就可以了。
1. 在PHP.ini中搜索关键字 : allow_call_time_pass_reference 没有的自行建立。
2. 将 Off 改成 On ,Web Server重起就OK了~
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of getimagesize(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. ind:\vhost\include\inc_custom_fields.php on line178
*/
我把php.ini的display_errors = on改成display_errors = off // (不显示错误)
就不显示了。
虽然没有什么影响。但是心里还是有个疙瘩。。。
百度上没有找到什么答案,然后在google上 找到了。
修改php.ini就可以了。
1. 在PHP.ini中搜索关键字 : allow_call_time_pass_reference 没有的自行建立。
2. 将 Off 改成 On ,Web Server重起就OK了~
allow_call_time_pass_reference = Off 变成 allow_call_time_pass_reference = On
ps
文档注解为:
是否启用在函数调用时强制参数被按照引用传递。此方法已不被赞成并在 PHP/Zend 未来的版本中很可能不再支持。鼓励使用的方法是在函数定义中指定哪些参数应该用引用传递。鼓励大家尝试关闭此选项并确保脚本能够正常运行,以确保该脚本也能在未来的版本中运行(每次使用此特性都会收到一条警告,参数会被按值传递而不是按照引用传递)。
在函数调用时通过引用传递参数是不推荐的,因为它影响到了代码的整洁。如果函数的参数没有声明作为引用传递,函数可以通过未写入文档的方法修改其参数。要避免其副作用,最好仅在函数声明时指定那个参数需要通过引用传递。
要引用传入参数,可以两种方法;
// 1、function test1($a,$b){$b = "fun_test1";return;}$a = "a_value";$b = "b_value";test1($a,&$b); // 2、function test2($a,&$b){$b = "fun_test2";return;}$a = "a_value";$b = "b_value";test2($a,$b);
第一种情况就有可能会出现“Call-time pass-by-reference has been deprecated”这样的警告,所以建议使用第二种。
具体为什么第一个会报这样的错误呢?
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