Question

$data = "google,bing,searchengine,seo,search";

$exp = explode(",",$data);

$filtr = array("google","bing");

$fdat = str_replace($filtr,"",$data);

$clean = implode(",",$fdat);

echo $clean;

这给出了,,searchengine,seo,search

如何摆脱前两个空白逗号？

Answer 1

最好区分分割的数组$exp减去$filtr：

$clean = implode(',', array_diff($exp, $filtr));

这也可以避免您只删除其他字词的子字符串，例如从car中移除bike,car,carpet而导致bike,carpet而不是bike,pet。

如果您想在每个字词之前和之后允许空格，请考虑使用trim和preg_split：

$exp = preg_split('/\s*,\s*/', trim($data));

trim将删除任何前置和尾随空格，preg_split的模式也允许逗号周围的空格。

Answer 2

我在尝试使用此代码时遇到错误。您可以使用以下内容删除google＆amp; bing（在数组中）来自逗号分隔的字符串：

$data = "google,bing,searchengine,seo,search"; $exp = explode(",",$data); $filtr = array("google","bing"); $diff = array_diff($exp, $filtr); $clean = implode(",",$diff); echo $clean;

Answer 3

您的代码也可能如下所示：

$data = "google,bing,searchengine,seo,search";

$exp = explode(",",$data);

$filtr = array("google","bing");

foreach ($exp as $key => $item) {
  if (in_array($key, $filtr)) unset($exp[$key]);
}

$clean = implode(",",$exp);

echo $clean;

当$ data中的项目很少时，它很有用。对于大型阵列，需要进行优化。

Answer 4

如果在循环中检查值，那么你会更好：

$data = "google,bing,searchengine,seo,search";
$exp = explode(",",$data);
$filtr = array("google","bing");

foreach($exp as $k => $v)
{
    if(in_array($v,$filtr))
    {
        unset($ext[$k]);
    }
}
$clean = implode(",",$ext);
echo $clean;

如何摆脱空格？

4 个答案: