我有一个名为$data的关联数组，如下所示：
Array
(
[0] => Array
(
[student_image] => <img src="http://34.144.40.142/file/pic/photo/2015/02/02ff1a23db112db834b8f41748242bcb_240.png" alt="" width="180" height="160" class="photo_holder" />
)
[1] => Array
(
[student_image] => <img src="http://34.144.40.142/theme/frontend/foxplus/style/default/image/document/docx.png" alt="" />
)
[2] => Array
(
[student_image] => <img src="http://34.144.40.142/file/pic/photo/2015/02/da46580276da5c3a31b75e8b31d35ddf_240.png" alt="" width="180" height="160" class="photo_holder" />
)
)
实际的数组非常巨大，这里我只输入了数组中必需的数据。现在我想要的是，对于数组的每个元素，关键字[student_image]，我应该只得到图像的URL，而不是imag标记和任何其他数据。简而言之，我想要上面数组的以下输出：
Array
(
[0] => Array
(
[student_image] => http://34.144.40.142/file/pic/photo/2015/02/02ff1a23db112db834b8f41748242bcb_240.png
)
[1] => Array
(
[student_image] => http://34.144.40.142/theme/frontend/foxplus/style/default/image/document/docx.png"
)
[2] => Array
(
[student_image] => http://34.144.40.142/file/pic/photo/2015/02/da46580276da5c3a31b75e8b31d35ddf_240.png
)
)
对于数组$data的所有元素，我应该如何以最佳方式实现这一点？
提前谢谢。
试试这样的东西：
//$data is your array
$data = array_map(function($elem){
//$elem is each elemet of you array
return array('student_image' => preg_replace('/<img'ssrc="([^"]+)".+$/','$1',$elem['student_image']));
},$data);
您可以使用正则表达式提取URL
// $data is your existing array with img tags
$urls = array();
foreach ($data as $key => $value){
foreach ($value as $key1 => $img) {
preg_match('/<img[^>]*src="([^"]*)"[^>]*'/>/', $img, $srcmatch);
$urls[$key][$key1] = $srcmatch[1];
}
}
// now $urls is having only image url and have same structure of $data,
// You may replace $urls with $data
var_dump($urls);
希望这能有所帮助。