PHP를 7.2로 업그레이드한 후 주의해야 할 사항 요약

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

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

<?php
    $array = array();
    each($array);

    // Deprecated:  The each() function is deprecated. This message will be suppressed on further calls

<?php
    function func_new_each(&$array){
       $res = array();       $key = key($array);       if($key !== null){
           next($array); 
           $res[1] = $res[&#39;value&#39;] = $array[$key];           $res[0] = $res[&#39;key&#39;] = $key;
       }else{           $res = false;
       }       return $res;
    }

<?php
    count(&#39;&#39;);    // Warning:  count(): Parameter must be an array or an object that implements Countable

<?php
    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;
        }
    }

<?php
    $newfunc = create_function(&#39;$a,$b&#39;, &#39;return "ln($a) + ln($b) = " . log($a * $b);&#39;);    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.

<?php
    $newfunc = function ($a,$b){
        return "ln($a) + ln($b) = " . log($a * $b);
    };    echo $newfunc(2, M_E) . "\n";