PHP提取字符串中的图片地址2种方法

例子1 获取字符串中所有图片

<?php
$str='<p><img border="0" src="upfiles/2009/07/1246430143_1.jpg" alt=""/></p>';
$pattern="/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg]))[\'|\"].*?[\/]?>/";
preg_match_all($pattern,$str,$match);
print_r($match);
?>

结果显示：

Array
(
[0] => Array
(
[0] => <img border=”0″ src=”upfiles/2009/07/1246430143_1.jpg” alt=””/>
)

[1] => Array
(
[0] => upfiles/2009/07/1246430143_1.jpg
)

)

盒例子2，这个函数是提取站外以http,https

/**
* 提取字符串中图片url地址
* @param type $str
* @return type
*/
function getimgs($str) {
    $reg = '/((http|https):\/\/)+(\w+\.)+(\w+)[\w\/\.\-]*(jpg|gif|png)/';
    $matches = array();
    preg_match_all($reg, $str, $matches);
    foreach ($matches[0] as $value) {
        $data[] = get_file($value);
    }
    return $data;
}