Parse PHP and use regular expressions to solve the problem of collecting content layout_PHP tutorial

A common problem encountered when doing collection is content layout. I spent some time writing a function that replaces HTML tags and styles with regular expressions. I will share it with you.

Copy code The code is as follows:

/**
* Format content
* @param string $content It is best to use utf-8 encoding for the content
* @return string
*! This function needs to enable tidy extension
*/
function removeFormat($content) {
$replaces = array (
"//i" => '',
"//i" => '',
"//i" => '',
"//i" => '',
"// i" => '',
"//i" => '',
"//i" => " "/

/i" => "

",
"// i"=>'',
/* "//i" => '',//Do not enable it when encountering table content
"/< /table>/i" => '',
"//i" => '',
"//i" => '',
"//i" => '

',
"//i" => ' "//i" => '', */
"/style=.+?['|"]/i" => '' ,
"/class=.+?['|"]/i" => '',
"/id=.+?['|"]/i"=>'',
"/lang=.+?['|"]/i"=>'',
//"/width=.+?['|"]/i"=>'',/ /It’s hard to control and comment out
//"/height=.+?['|"]/i"=>'',
"/border=.+?['|"]/i" =>'',
"/face=.+?['|"]/i"=>'',
"/[ ]*/i" = > "

",
"/.*/i" => '',
"/ /i " => ' ',//Replace spaces with
"/[ |x{3000}|rn]*/ui" => '

',// Replace half-width and full-width spaces and line breaks, and use to eliminate encoding problems that occur when writing to the database

);
$config = array(
//'indent' => TRUE, // Whether to indent
'output-html' => TRUE,//Whether it is output xhtml
'show-body-only'=>TRUE,//Whether only the body is obtained
'wrap' => 0
);
$content = tidy_repair_string($content, $config, 'utf8');//First use the tidy class library that comes with php to repair the html tags, otherwise various problems will easily occur when replacing them. A weird situation
$content = trim($content);
foreach ( $replaces as $k => $v ) {
$content = preg_replace ( $k, $v, $content ) ;
}

if(strpos($content,'

')>6)//Some content may be missing the

tag at the beginning
$content = '< p> '.$content;

$content = tidy_repair_string($content, $config, 'utf8');//Repair it again to remove the html empty tags
$content = trim($content );
return $content;
}