php检查字符串中是否包含7位GSM字符的方法

本文实例讲述了php检查字符串中是否包含7位gsm字符的方法。分享给大家供大家参考。具体分析如下：

下面的代码检查一个字符串是否包含任何7位gsm字符。它对短信平台上工作的人非常有用。

<?php
function check_gsm($str)
{
  $arr = array(
"0x00", "0x01", "0x02", "0x03", "0x04", 
"0x05","0x06","0x07","0x08","0x09",
"0x0a","0x0b","0x0c","0x0d","0x0e","0x0f","0x10","0x11","0x12","0x13",
"0x14","0x15","0x16","0x17","0x18","0x19","0x1a","0x1b","0x1b0a",
"0x1b14","0x1b28","0x1b29","0x1b2f","0x1b3c","0x1b3d","0x1b3e",
"0x1b40","0x1b65","0x1c","0x1d","0x1e","0x1f","0x20","0x21","0x22",
"0x23","0x24","0x25","0x26","0x27","0x28","0x29","0x2a","0x2b","0x2c",
"0x2d","0x2e","0x2f","0x30","0x31","0x32","0x33","0x34","0x35","0x36",
"0x37","0x38","0x39","0x3a","0x3b","0x3c","0x3d","0x3e","0x3f","0x40",
"0x41","0x42","0x43","0x44","0x45","0x46","0x47","0x48","0x49","0x4a",
"0x4b","0x4c","0x4d","0x4e","0x4f","0x50","0x51","0x52","0x53","0x54",
"0x55","0x56","0x57","0x58","0x59","0x5a","0x5b","0x5c","0x5d","0x5e",
"0x5f","0x60","0x61","0x62","0x63","0x64","0x65","0x66","0x67","0x68",
"0x69","0x6a","0x6b","0x6c","0x6d","0x6e","0x6f","0x70","0x71","0x72",
"0x73","0x74","0x75","0x76","0x77","0x78","0x79","0x7a","0x7b","0x7c",
"0x7d","0x7e","0x7f");
  $strl = strlen($str);
  for ($i = 0;$i < $strl; $i++)
  {
    $char = '0x' . bin2hex(substr($str,$i,1));
    $pos = in_array($char,$arr);
    if ($pos == 1)
    {
      $j++;
    }
  }
  if ($j < $strl)
  {
    return false;
  }
  else
  {
    return true;
  }
}
?>

希望本文所述对大家的php程序设计有所帮助。