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@ 2015-12-21T07:28:15Z

<?php
function get_tumbail($imgSrc,$placeholder_image){
            $imgPattern = "/(http\:\/\/ww\d+\.sinaimg\.cn\/)(\w+)(\/\S+\.(jpg|gif))/i";
            $matches = null;
            $result = preg_match($imgPattern, $imgSrc, $matches);
            if (!$result) {
                return $placeholder_image;
            }
            return $matches[1] . 'thumbnail' . $matches[3];
        }
 $placeholder_image = 'images/transparent.gif';
$imgStr = '<img src="http://ww2.sinaimg.cn/bmiddle/a3d444e3jw1ez79amvdi1j20l50s8gpl.jpg"/>';
$imgStr = preg_replace_callback('#<img([^>]+?)src=[\'"]?([^\'"\s>]+)[\'"]?([^>]*)>#',function($match) {
    var_dump($match);
    return sprintf('<img${1}src="%s" data-original="${2}" class="lazy"${3}><noscript><img${1}src="${2}"${3}></noscript>', get_tumbail($match[2],$placeholder_image));
},$imgStr);
var_dump($imgStr);

Output for git.master, git.master_jit, rfc.property-hooks: array(4) { [0]=> string(79) "<img src="http://ww2.sinaimg.cn/bmiddle/a3d444e3jw1ez79amvdi1j20l50s8gpl.jpg"/>" [1]=> string(1) " " [2]=> string(66) "http://ww2.sinaimg.cn/bmiddle/a3d444e3jw1ez79amvdi1j20l50s8gpl.jpg" [3]=> string(1) "/" } Warning: Undefined variable $placeholder_image in /in/u41cd on line 15 string(165) "<img${1}src="http://ww2.sinaimg.cn/thumbnail/a3d444e3jw1ez79amvdi1j20l50s8gpl.jpg" data-original="${2}" class="lazy"${3}><noscript><img${1}src="${2}"${3}></noscript>"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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