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This article mainly talks about the dedecms keyword replacement plan. First replace the long-tail keywords and then replace the main keywords according to the frequency. This article has certain reference value, and interested friends can learn about it.
For example:
Long tail keyword 1: Men drink gold silk What are the benefits of golden chrysanthemum?
Long tail keyword 2: What are the benefits of drinking golden silk royal chrysanthemum?
Main keyword 3: golden silk royal chrysanthemum
Use the system In the default function, when replacing the main keyword, the "Golden Thread Royal Chrysanthemum" in the long-tail keyword that has been replaced above will also be replaced, thus destroying the original long-tail keyword anchor text.
1. First replace the keyword to be replaced with something like:
Keyword 1: '
##0
##'
Keyword 2:'
##2
##'
Keyword 3:'
##3
##'
When performing the above replacement operation , we need to save the anchor text corresponding to the keyword, such as:
##0
##' --> Anchor text of keyword 1'##1 ##' --> Anchor text of keyword 2
'
//高亮专用, 替换多次是可能不能达到最多次 function _highlight($string, $words, $result, $pre) { global $cfg_replace_num; // if (version_compare(PHP_VERSION, '5.5.0', '>=')) // { // $string = $string[0]; // $pre = $pre[0]; // } //修改 Start $replaced_array = array(); $replaced_tiems = 0; //修改 End $string = str_replace('\"', '"', $string); if ($cfg_replace_num > 0) { foreach ($words as $key => $word) { if ($GLOBALS['replaced'][$word] == 1) { continue; } //修改 Start $replace_string = '#####' . $replaced_tiems . '#####'; $replaced_array[$replace_string] = $result[$key]; $string = preg_replace("#" . preg_quote($word) . "#", $replace_string, $string, $cfg_replace_num); $replaced_tiems+= 1; //修改 End // $string = preg_replace("#".preg_quote($word)."#", $result[$key], $string, $cfg_replace_num); if (strpos($string, $word) !== FALSE) { $GLOBALS['replaced'][$word] = 1; } } //修改 Start foreach ($replaced_array as $k => $v) { $string = str_ireplace($k, $v, $string); } //修改 End } else { $string = str_replace($words, $result, $string); } return $pre . $string; }###Note: Here we need to modify the document keywords in the background The frequency, the default is to replace those with high frequency first, and replace those with low frequency later ######Related tutorials: ###PHP video tutorial#########
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