Numeric range validator. Check the new value is available in the range or not with php.

validate.php

<?php
  // initialize
  $range = array();
  $range_price = array();

  // data range   
  $range = array (
    0 => array (
        "min_range" => 10000,
        "max_range" => 14000
    ),
    1 => array (
        "min_range" => 15000,
        "max_range" => 17500
    )
  );
  
  // get each range
  foreach ($range as $key => $value) {
      // initialize for minimum and maximum range
      $min_range = $value["min_range"] - 1;
      $max_range = $value["max_range"] + 1;

      // check the minimum and maximum range
      $new_start = min($max_range, max($min_range, $price_start));
      $new_end   = min($max_range, max($min_range, $price_end));

      // check possibility
      $parameters = ($new_start === $new_end) ? 1 : 0;
      $range_price[] = $parameters;
  }

  // had possibility ?
  if (in_array(0, $range_price, true)) {
      $is_error  = 1;
      $error_msg = "Range available.";
  } else {
      // doSomething
      //   ...
      //   ...
      //   ...
  }

?>