一段在正文中插入标题图的函数

原理

源码

function textPic($id,$classid) {
    global $class_r,$dbtbpre,$empire;
    $id=(int)$id;
    $classid = (int)$classid;
    $tbname = $class_r[$classid]['tbname'];
    $re=$empire->fetch1("select * from {$dbtbpre}ecms_$tbname where id = $id and classid = $classid");
    $ref = $empire->fetch1("select newstext from {$dbtbpre}ecms_{$tbname}_data_{$re['stb']} where id = $id and classid = $classid");
    $text = stripslashes($ref['newstext']);
    if (strpos($text, '<img') !== false || empty($re['titlepic'])) {
        return $text;
    }
    
    $titlepic = "<img src=\"{$re['titlepic']}\">";
    
    foreach (['<br>', '<br/>', '<br />'] as $tag) {
        if (($pos = stripos($text, $tag)) !== false) {
            return substr_replace($text, $titlepic, $pos + strlen($tag), 0);
        }
    }
    
    if (($pos = stripos($text, '</p>')) !== false) {
        return substr_replace($text, $titlepic, $pos, 0);
    }
    
    return $text;
}