The simplest scenario for reading XML in PHP:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<list>1</list>
<list>2</list>
<list>3</list>
</xml>
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
foreach ($xml->getelementsbytagname (' list ') as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
?>
The results of the cy.php operation:
1
2
3
=============
Reading XML in PHP is slightly more complex:
Cy.xml is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
</xml>
Cy.php is as follows (and the first situation does not change):
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
foreach ($xml->getelementsbytagname (' list ') as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
?>
The results of the cy.php are the same as for the first time:
1
2
3
PHP reads XML in the third case:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
<main>
<list>4</list>
<list>5</list>
<list>6</list>
</main>
</xml>
The php file (cy.php) is as follows (and for the first time remains unchanged):
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
foreach ($xml->getelementsbytagname (' list ') as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
?>
cy.php Output Results:
1
2
3
4
5
6
===========
PHP read the fourth case of XML, keep cy.xml unchanged, change cy.php:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
<main>
<list>4</list>
<list>5</list>
<list>6</list>
</main>
</xml>
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
$main = $xml->getelementsbytagname (' main ');
foreach ($main as $main)
{
$list = $main->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
?>
cy.php Output Result:
1
2
3
4
5
6
Why are the two cy.php different, but the output is the same? Let's take a look at the next example
==============
PHP read the fifth case of XML, change cy.xml, so that cy.php maintain the fourth case:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
<main>
<list>4</list>
<list>5</list>
<list>6</list>
</main>
<m>
<list>7</list>
<list>8</list>
<list>9</list>
</m>
</xml>
The php file (cy.php) is the same as the fourth:
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
$main = $xml->getelementsbytagname (' main ');
foreach ($main as $main)
{
$list = $main->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
?>
cy.php output results are:
1
2
3
4
5
6
Why
<m>
<list>7</list>
<list>8</list>
<list>9</list>
</m>
7,8,9 is not read out?
Because our cy.php only reads the content in the <main></main> tag .<m></m> the content in the tag is not read.
The "tags" we refer to here are called "nodes" in XML;
About the concept of "node", we will explain later.
PHP reads XML Six, again foreach, we read 7,8,9!:
The XML file (CY.XM) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
<main>
<list>4</list>
<list>5</list>
<list>6</list>
</main>
<m>
<list>7</list>
<list>8</list>
<list>9</list>
</m>
</xml>
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
$main = $xml->getelementsbytagname (' main ');
foreach ($main as $main)
{
$list = $main->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
$m = $xml->getelementsbytagname (' m ');
foreach ($m as $m)
{
$list = $m->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
?>
cy.php Output Result:
1
2
3
4
5
6
7
8
9
===============
PHP reads XML Seven, Cy.xml becomes more complex:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<main>
<title>a</title>
<list>1</list>
<list>2</list>
<list>3</list>
</main>
<main>
<title>b</title>
<list>4</list>
<list>5</list>
<list>6</list>
</main>
<m>
<title>c</title>
<list>7</list>
<list>8</list>
<list>9</list>
</m>
</xml>
So how do we read only the values in <main></main> <title></title>?
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = new DOMDocument ();
$xml->load (' cy.xml ');
$main = $xml->getelementsbytagname (' main ');
foreach ($main as $main)
{
$list = $main->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
$title = $main->getelementsbytagname ("title");
foreach ($title as $title)
{
$value = $title->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
$m = $xml->getelementsbytagname (' m ');
foreach ($m as $m)
{
$list = $m->getelementsbytagname ("list");
foreach ($list as $list)
{
$value = $list->firstchild->nodevalue;
echo $value. " <br/> ";
}
}
?>
cy.php Output Result:
1
2
3
A
4
5
6
7
8
9
Think about, how to read out the value of <title></title> in <m>?
PHP reads XML and consolidates it with an example:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<LevelOne>
<LevelTwo>
<levelthree id= "1″>this is Text one</levelthree>
<levelthree id= "2″>this is Text two</levelthree>
<levelthree id= "3″>this is Text three</levelthree>
</LevelTwo>
<LevelTwo>
<levelthree id= "4″>this is Text four</levelthree>
<levelthree id= "5″>this is Text five</levelthree>
<levelthree id= "6″>this is Text six</levelthree>
</LevelTwo>
</LevelOne>
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = new DOMDocument (); Build a DOMDocument
$xml->load (' cy.xml '); PHP specifies where the XML file needs to be read
$LevelOne = $xml->getelementsbytagname (' Levelone ');//Get the node by name, return the collection of all nodes, but there is no point in reading Levelone here ....
$LevelOne = $xml->getelementsbytagname (' Levelone ')->item (0);//return the contents of the first Levelone node
$LevelTwo = $LevelOne->getelementsbytagname (' leveltwo '); Gets the node by name, returns all Leveltwo
The foreach ($LevelTwo as $Content)/loop reads out all Leveltwo, and in the loop, leveltwo the Content
{
$LevelThree = $Content->getelementsbytagname (' levelthree ');/return all Levelthree
foreach ($LevelThree as $Concert)
{
$name = $Concert->nodename;//node name
$value = $Concert->nodevalue;//node value
$id = $Concert->getattribute (' id ');//"id" property value
echo $name. " <br/> ";
echo $value. " <br/> ";
echo $id. " <br/> ";
}
}
?>
If you get the node in such a way as $levelone = $xml->getelementsbytagname (' Levelone '), then the contents of the read inside need to be looped with a foreach because $levelone = $xml-> getElementsByTagName (' Levelone ') returns, is a collection, not a specific node--only the node called Levelone only one ....
If you obtain a node in a manner such as $levelone = $xml->getelementsbytagname (' Levelone ')->item (0), then the contents can be read directly $levelone->xxxxxx , because this returns a specific node.
Now provides an easy way to read XML in PHP:
The XML file (Cy.xml) is as follows:
Copy Code code as follows:
<?xml version= "1.0″encoding=" gb2312″?>
<xml>
<site>
<part id= "1″>
<title id= "a" >czbin XML forum </title>
<describe>xml related articles </describe>
</part>
<part id= "2″>
<title id= "b" >czbin PHP forum </title>
<describe>php related articles </describe>
</part>
<part id= "3″>
<title id= "C" >czbin Ajax forum </title>
<describe>ajax related articles </describe>
</part>
</site>
</xml>
The php file (cy.php) is as follows:
Copy Code code as follows:
<?php
$xml = simplexml_load_file (' Sxml.xml ');
$part = $xml->site->part;
foreach ($part as $content)
{
echo $content [' ID ']. <br/> ";
echo $content->title. " <br/> ";
echo $content->title[' id ']. " <br/> ";
echo $content->describe. " <br/> ";
}
?>
cy.php Output Result:
1
Czbin XML Forum
A
Articles related to XML
2
Czbin PHP Forum
Related articles in PHP
3
Czbin Ajax Forum
C
Ajax-related articles
What do you think? It's really simple!
