如何从 PHP 中的字符串中删除特定数字

Question

如何从字符串中删除特定数字，如果该数字重复，我只需要将其删除一次。$string = "1 3 5 15 5";//Remove 5$valuetoremove = "5";$newvalue = "1 3 15 5";我试过 str_replace 但这会删除所有重复的数字。str_replace("5"," ","1 3 5 15 5");$newvalue = "1 3";

Answer 1

如果您特别想将其删除一次，那么我想这就是您所追求的

$string = "1 3 5 15 5";

$valueToRemove = "5";

$exploded = explode(" ", $string);

// $exploded = ["1", "3", "5", "15", "5"];

$key = array_search($valueToRemove, $exploded, true);

if ($key !== false) {

  unset($exploded[$key]);

}

$newValue = implode(" ", $exploded);