Answers for "match array value from multidimensional array in php"

PHP multidimensional array search by value

$key = array_search('100', array_column($userdb, 'uid'));

multiple value match in array php

$uniqueKeys = array_unique($list[0])

foreach ($uniqueKeys as $uniqueKey)
{
  $v = array_keys($list[0], $uniqueKey);

  if (count($v) > 1)
  {
    foreach ($v as $key)
    {
      // Work with $list[0][$key]
    }

  }
}