Request an explanation of the PHP DOM syntax

doc->preservewhitespace=false;

Whether to keep extra white characters in the document, such as spaces longer than two.

If it is set to false, it will not be retained.

You can use xml parser I like to use this library

This is a PHP5 HTML document parser, example

Create an html object, this is the homepage of Google to find all the img srcs in the object

foreach($html->find('img') as $element)

echo $element->src . '

Find the hrefs of all the a in the object

foreach($html->find('a') as $element)

echo $element->href . '';

$post_data['c1'] = "test012";

post_data['c2'] = "test088";

echo mpost($url,$post_data);

A small function that I used before.

The easiest way.

Replace class with id

And then"huoqu");

What needs to be fetched is replaced

Save the document and encode it as UTF-8. All documents must be encoded in UTF-8, and that's fine.

In the DOM, the first term of the child node is always empty, and it should start with the second term, which is $arr[$i][1].

$x->removechild($x->childnodes->item(0))

The first node here is $x->removechild($x->childnodes->item(1)).

Take a look at the structure of the dom object for yourself.

The meaning of this sentence:

Add a div element to the $img element at the end, and add the $img element to the top of the $this element.

$("").append() means to add the div element to the end (inside) of the specified element, which is not a half-sentence, if it is $("Hello").append() is wrong, because there is content in the div, and it has to be written as $("Hello