PHP Cut page div content Implementation code sharing _php instance

Highlight:
1, the use of PHP can also achieve the page div cutting processing. Here, we hope that readers can provide a more perfect solution.
2, cutting processing method has been encapsulated into a method, can be directly referenced.
3, by the way plus the interception of the tag cloud. Getwebdiv (' id= ' taglist ', ' http://www.jb51.net/tag/');

Copy Code code as follows:

<?php
Header ("content-type:text/html; Charset=utf-8 ");
function Getwebdiv ($div _id, $url =false, $data =false) {
if ($url!== false) {
$data = file_get_contents ($url);
}
$charset _pos = Stripos ($data, ' CharSet ');
if ($charset _pos) {
if (Stripos ($data, ' utf-8 ', $charset _pos)) {
$data = Iconv (' utf-8 ', ' utf-8 ', $data);
}else if (Stripos ($data, ' gb2312 ', $charset _pos)) {
$data = Iconv (' gb2312 ', ' utf-8 ', $data);
}else if (Stripos ($data, ' GBK ', $charset _pos)) {
$data = Iconv (' GBK ', ' utf-8 ', $data);
}
}
Preg_match_all ('/<div/i ', $data, $pre _matches,preg_offset_capture); Get all div prefixes
Preg_match_all ('/<\/div/i ', $data, $suf _matches,preg_offset_capture); Get all div suffixes
$hit = Strpos ($data, $div _id);
if ($hit = = 1) return false; Not hit
$divs = Array (); Merge all Div
foreach ($pre _matches[0] as $index => $pre _div) {
$divs [(int) $pre _div[1]] = ' P ';
$divs [(int) $suf _matches[0][$index][1]] = ' s ';
}
To sort a div
$sort = Array_keys ($divs);
Asort ($sort);
$count = count ($pre _matches[0]);
foreach ($pre _matches[0] as $index => $pre _div) {
<div $hit <div+1 Div is hit
if ($pre _matches[0][$index][1] < $hit) && ($hit < $pre _matches[0][$index +1][1)) {
$deeper = 0;
Popup div before the hit Div
while (Array_shift ($sort)!= $pre _matches[0][$index][1] && ($count-)) continue;
Match the remaining Div, and if the next one is prefixed, $deeper plus 1,
Otherwise, the $deeper minus 1, the $deeper is 0 hits match, the div length is calculated
foreach ($sort as $key) {
if ($divs [$key] = = ' P ') $deeper + +;
else if ($deeper = = 0) {
$length = $key-$pre _matches[0][$index][1];
Break
}else {
$deeper--;
}
}
$hitDivString = substr ($data, $pre _matches[0][$index][1], $length). ' </div> ';
Break
}
}
return $hitDivString;
}
echo getwebdiv (' id= ' taglist ', ' http://www.jb51.net/tag/');
end_php

Considering the ID symbol problem, the id= "U" is filled out by the user.
Disclaimer: This section of PHP is only for read with ID div content.
Perfect: Match any closed with ID tag

Copy Code code as follows:

View Code
<?php
Header ("content-type:text/html; Charset=utf-8 ");
function Getwebtag ($tag _id, $url =false, $tag = ' div ', $data =false) {
if ($url!== false) {
$data = file_get_contents ($url);
}
$charset _pos = Stripos ($data, ' CharSet ');
if ($charset _pos) {
if (Stripos ($data, ' utf-8 ', $charset _pos)) {
$data = Iconv (' utf-8 ', ' utf-8 ', $data);
}else if (Stripos ($data, ' gb2312 ', $charset _pos)) {
$data = Iconv (' gb2312 ', ' utf-8 ', $data);
}else if (Stripos ($data, ' GBK ', $charset _pos)) {
$data = Iconv (' GBK ', ' utf-8 ', $data);
}
}
Preg_match_all ('/< '. $tag. /I ', $data, $pre _matches,preg_offset_capture); Get all div prefixes
Preg_match_all ('/<\/'. $tag. /I ', $data, $suf _matches,preg_offset_capture); Get all div suffixes
$hit = Strpos ($data, $tag _id);
if ($hit = = 1) return false; Not hit
$divs = Array (); Merge all Div
foreach ($pre _matches[0] as $index => $pre _div) {
$divs [(int) $pre _div[1]] = ' P ';
$divs [(int) $suf _matches[0][$index][1]] = ' s ';
}
To sort a div
$sort = Array_keys ($divs);
Asort ($sort);
$count = count ($pre _matches[0]);
foreach ($pre _matches[0] as $index => $pre _div) {
<div $hit <div+1 Div is hit
if ($pre _matches[0][$index][1] < $hit) && ($hit < $pre _matches[0][$index +1][1)) {
$deeper = 0;
Popup div before the hit Div
while (Array_shift ($sort)!= $pre _matches[0][$index][1] && ($count-)) continue;
Match the remaining Div, and if the next one is prefixed, $deeper plus 1,
Otherwise, the $deeper minus 1, the $deeper is 0 hits match, the div length is calculated
foreach ($sort as $key) {
if ($divs [$key] = = ' P ') $deeper + +;
else if ($deeper = = 0) {
$length = $key-$pre _matches[0][$index][1];
Break
}else {
$deeper--;
}
}
$hitDivString = substr ($data, $pre _matches[0][$index][1], $length). ' </'. $tag. ' > ';
Break
}
}
return $hitDivString;
}
echo Getwebtag (' id= ' nav ', ' http://mail.163.com/html/mail_intro/', ' ul ');
echo Getwebtag (' id= ' homebanners ', ' http://mail.163.com/html/mail_intro/');
echo Getwebtag (' id= ' performance ', ' http://mail.163.com/html/mail_intro/', ' section ');
end_php

Author: Zjmainstay