富文本編輯器中替換img的src屬性由相對路徑替換為絕對路徑

foreach($res as $k => $v){
　　

$res[$k]['content'] = htmlspecialchars_decode($v['content']);     //html實體轉標簽
preg_match_all('/(?<=img.src=").*?(?=")/', $res[$k]['content'], $out, PREG_PATTERN_ORDER);      //正則匹配img標簽的src屬性，返回二維數組
if (!empty($out)) {
    foreach ($out as $v) {
        foreach ($v as $j) {
            $url = "https://".$_SERVER['SERVER_NAME'].$j; 
            $res[$k]['content'] = str_replace($j, $url, $res[$k]['content']);   //替換相對路徑為絕對路徑
        }
    }
}

}