getting all values from h1 tags using php
I want to receive an array that contains all the h1 tag values from a text
E开发者_如何学JAVAxample, if this where the given input string:
<h1>hello</h1>
<p>random text</p>
<h1>title number two!</h1>
I need to receive an array containing this:
titles[0] = 'hello',
titles[1] = 'title number two!'
I already figured out how to get the first h1 value of the string but I need all the values of all the h1 tags in the given string.
I'm currently using this to receive the first tag:
function getTextBetweenTags($string, $tagname)
{
$pattern = "/<$tagname ?.*>(.*)<\/$tagname>/";
preg_match($pattern, $string, $matches);
return $matches[1];
}
I pass it the string I want to be parsed and as $tagname I put in "h1". I didn't write it myself though, I've been trying to edit the code to do what I want it to but nothing really works.
I was hoping someone could help me out.
Thanks in advance.
you could use simplehtmldom:
function getTextBetweenTags($string, $tagname) {
// Create DOM from string
$html = str_get_html($string);
$titles = array();
// Find all tags
foreach($html->find($tagname) as $element) {
$titles[] = $element->plaintext;
}
}
function getTextBetweenTags($string, $tagname){
$d = new DOMDocument();
$d->loadHTML($string);
$return = array();
foreach($d->getElementsByTagName($tagname) as $item){
$return[] = $item->textContent;
}
return $return;
}
Alternative to DOM. Use when memory is an issue.
$html = <<< HTML
<html>
<h1>hello<span>world</span></h1>
<p>random text</p>
<h1>title number two!</h1>
</html>
HTML;
$reader = new XMLReader;
$reader->xml($html);
while($reader->read() !== FALSE) {
if($reader->name === 'h1' && $reader->nodeType === XMLReader::ELEMENT) {
echo $reader->readString();
}
}
function getTextBetweenH1($string)
{
$pattern = "/<h1>(.*?)<\/h1>/";
preg_match_all($pattern, $string, $matches);
return ($matches[1]);
}
加载中,请稍侯......
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