2

I'd like to get a ID from a node from my HTML? I have the major item, but I'd like to check if this item has a specific ID. How can I do this?

The HTML:

<map name="Map" id="Map"> <area shape="poly" coords="181,1283,83,1282,108,177,1124,174,1124,205,1124,213,1126,218,1141,221,1182,224,1204,224,1231,221,1253,218,1265,203,1266,174,2055,171,2055,1092,2002,1077,1935,1057,1920,1052,1904,1051,1901,1043,1893,1036,1874,1034,1861,1030,1829,1025,1802,1022,1785,1021,1765,1020,1741,1018,1723,1022,1720,1026,1714,1029,1713,1035,1715,1041,1713,1049,1616,1047,1509,1047,1436,1048,1417,1049,1386,1049,1318,1048,1304,1047,1300,1048,1288,1052,1278,1049,1247,1047,1177,1049,1135,1048,1069,1047,1047,1046,1000,1047,946,1047,902,1048,842,1048,814,1049,799,1049,778,1049,768,1051,763,1050,742,1048,698,1048,662,1048,573,1101,581,387,575,385,197,386,181,1283" href="#" /> <area id="excludente" shape="rect" coords="952,491,1494,769" href="#" /> <area id="excludente" shape="poly" coords="654,599,663,580,669,577,731,578,736,579,739,588,738,599,738,677,734,682,729,684,667,685,662,679,659,668,653,600,653,598" href="#" /> <area id="excludente" shape="poly" coords="1695,582,1697,579,1700,577,1709,576,1769,576,1771,578,1787,598,1786,605,1770,681,1764,685,1746,684,1705,683,1698,681,1696,675,1695,583" href="#" /> <area shape="poly" coords="-1,84,2056,78,2055,0,0,0,0,83" href="#" /> </map>

My code:

 $DOM = new DOMDocument; $DOM->loadHTML($conteudo['ambiente']->mapeamento); $xpath = new DOMXPath($DOM); $tags = $xpath->query('//area/@shape'); $total_local = 0; foreach ($tags as $linha => $tag) { $ctags = $xpath->query("//area/@id", $tag); //How do I get the specific ID from area shape node? }
Improve this question
2
  • 1
    you need to post a piece of XML to we could see its structure, otherwise it is a wild guess at best Commented Mar 5, 2013 at 3:56
  • Sorry, now it's updated. Sometimes the id="excludente" appears, sometimes don't. I have to know that related with the shape tag. Commented Mar 5, 2013 at 4:02

2 Answers 2

Reset to default
3

You need to use a relative XPath. You can either do this:

$tags = $xpath->query('//area/@shape'); $total_local = 0; foreach ($tags as $linha => $tag) { // Context node is @shape $ctags = $xpath->query("../@id", $tag); $id = ''; if(length($ctags) > 0) { $id = $ctags[0]; } }

Or this if you actually want to iterate through area elements and not @shape attributes:

$tags = $xpath->query('//area[@shape]'); $total_local = 0; foreach ($tags as $linha => $tag) { // Context node is area $ctags = $xpath->query("@id", $tag); $id = ''; if(length($ctags) > 0) { $id = $ctags[0]; } }
Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

2

Try this:

$DOM = new DOMDocument; $DOM->loadHTML($conteudo['ambiente']->mapeamento); $xpath = new DOMXPath($DOM); $tags = $xpath->query("//area[@shape='whatever-shape-you-need-here']"); // $xpath->query("//area[@shape]") - if only need nodes that have shape attribute $total_local = 0; foreach ($tags as $linha => $tag) { $id = $tag.getAttribute("id"); // your needed id }

Note, I have not done xpath for quite a while - really really rusty on it ;)

Improve this answer

Comments

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.