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<?php $pat="|<img.?src=\'\"[\'\"].?>|i"; $content = <<< LOL <img src="http://img.dewen.org/upload/avatar/010/128/696/user_10128696_avatar_1384404591_r.png" id="top_avatar"> <span class="name" title="mdep, mga_dependent@163.com">我<i></i></span> <img src="http://img.dewen.org/upload/avatar/010/128/696/user_10128696_avatar_1384404591_r.png" id="top_avatar" class="icons" title="mdep, mga_dependent@163.com"> <span class="name" title="mdep, mga_dependent@163.com">我<i></i></span> LOL; preg_match_all('|<img.?src=\'"[\'"].?>|i', $content, $images); var_dump($images);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [0]=> array(0) { } }

preferences:
201.31 ms | 406 KiB | 314 Q