PHP升级7.2之后需要注意的事情

最近升级了PHP版本,从7.1升级到7.2,升级前版本: PHP 7.1.14 (cli) (built: Feb 2 2018 08:42:59) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies with Zend OPcache v7.1.14, Copyright (c) 1999-2018, by Zend Technologies with Xdebug v2.6.0, Copyright (c) 2002-2018, by Derick Rethans 升级后版本: PHP 7.2.2 (cli) (built: Feb 24 2018 17:51:12) ( ZTS DEBUG ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies with Zend OPcache v7.2.2, Copyright (c) 1999-2018, by Zend Technologies 升级完成之后发现有几个框架在使用时都出现了问题,主要原因集中在7.2之后废弃了一些功能,下面列出几个常见的问题: ### 1、each函数已被废弃: 之前版本写法: $array = array(); each($array); // Deprecated: The each() function is deprecated. This message will be suppressed on further calls 在7.2版本中会提示过时,可以使用foreach替代each方法,也可以自己修改each方法替代: function func_new_each(&$array){ $res = array(); $key = key($array); if($key !== null){ next($array); $res[1] = $res['value'] = $array[$key]; $res[0] = $res['key'] = $key; }else{ $res = false; } return $res; } ### 2、当传递一个无效参数时,count()函数将抛出warning警告: count(''); // Warning: count(): Parameter must be an array or an object that implements Countable 在7.2版本中将严格执行类型区分,参数类型不正确,将会出现警告,所以需要在使用count方法时注意参数的值,不过也可以通过自己修改方法来替代(不建议): 之前版本写法 function func_new_count($array_or_countable,$mode = COUNT_NORMAL){ if(is_array($array_or_countable) || is_object($array_or_countable)){ return count($array_or_countable, $mode); }else{ return 0; } } ### 3、create_function被废弃,可以用匿名函数来代替: 之前版本写法: $newfunc = create_function('$a,$b', 'return "ln($a) + ln($b) = " . log($a * $b);'); echo "New anonymous function: $newfunc\n"; echo $newfunc(2, M_E) . "\n"; // outputs // New anonymous function: lambda_1 // ln(2) + ln(2.718281828459) = 1.6931471805599 // Warning This function has been DEPRECATED as of PHP 7.2.0. Relying on this function is highly discouraged. 在7.2版本中会有警告提示,可修改为匿名函数来替代: $newfunc = function ($a,$b){ return "ln($a) + ln($b) = " . log($a * $b); }; echo $newfunc(2, M_E) . "\n";
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