Php在foreach

Question

如何在foreach中找到突出显示的字符串？

这会遍历我数据库的所有用户，我想找到所有让我们说的美元。

$um = "Um";
foreach($users as $user){
     # find here the string um or something
     echo $user;
}

我如何做到这一点？

Answer 1

实际上，我会在查询中执行此操作.. ..但

$um = "Um";

foreach($users as $user){

    if(strpos($user,$um) !== false){

        echo $user;

    }
}

strpos()返回一个字符串位置，因此返回值“0”将是字符串开头的匹配项。因此，请检查“非虚假” http://php.net/manual/en/function.strpos.php

Answer 2

   $um  = "this is string contains um";

  $keyword[] = "um"; // the word/parts you wanna highlight

  $result = $um;

  foreach($keyword as $key)   {


    $result = str_replace($key, "<strong>$key</strong>", $result);
  }               


echo $result;

Answer 3

您可以使用preg_match

$um = "Um";
foreach($users as $user){
     if( preg_match( "@$um@", $user, $matches ) ) echo $user;
}