Detectar Texto UTF8 en PHP - PHP Snipplr Social Repository

Revision: 53286

at November 18, 2011 02:24 by n19ht

Updated Code

function isUTF8($string){
    for($idx = 0, $strlen = strlen($string); $idx < $strlen; $idx++){
		$byte = ord($string[$idx]);
		if($byte & 0x80){
			if(($byte & 0xE0) == 0xC0){
			  // 2 byte char
			  $bytes_remaining = 1;
			}elseif(($byte & 0xF0) == 0xE0){
			  // 3 byte char
			  $bytes_remaining = 2;
			}elseif(($byte & 0xF8) == 0xF0){
			  // 4 byte char
			  $bytes_remaining = 3;
			}else{
			  return false;
			}

			if($idx + $bytes_remaining >= $strlen){
			  return false;
			}

			while($bytes_remaining--){
				if((ord($string[++$idx]) & 0xC0) != 0x80){
					return false;
				}
			}
		}
	}
    return true;
}

Revision: 53285

at November 18, 2011 02:22 by n19ht

Initial Code

function isUTF8($string)
  {
    for ($idx = 0, $strlen = strlen($string); $idx < $strlen; $idx++)
    {
      $byte = ord($string[$idx]);
 
      if ($byte & 0x80)
      {
        if (($byte & 0xE0) == 0xC0)
        {
          // 2 byte char
          $bytes_remaining = 1;
        }
        else if (($byte & 0xF0) == 0xE0)
        {
          // 3 byte char
          $bytes_remaining = 2;
        }
        else if (($byte & 0xF8) == 0xF0)
        {
          // 4 byte char
          $bytes_remaining = 3;
        }
        else
        {
          return false;
        }
 
        if ($idx + $bytes_remaining >= $strlen)
        {
          return false;
        }
 
        while ($bytes_remaining--)
        {
          if ((ord($string[++$idx]) & 0xC0) != 0x80)
          {
            return false;
          }
        }
      }
    }
 
    return true;
  }

Initial URL

Initial Description

Esta funciÃ³n devuelve true si el argumento estÃ¡ codificado en utf8

Initial Title

Detectar Texto UTF8 en PHP

Initial Tags

php

Initial Language

PHP

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