Using ord in php to intercept Chinese strings and solve the problem of garbled characters_PHP tutorial

Below we give two examples, both of which use ord to judge character ascii to avoid the problem of Chinese garbled characters. For the function of this function, we can refer to http://www.bKjia.c0m/phper/php/41030. htm article, which gives a good introduction to the use of this function.

//s character short integer 2 bytes
$str=(pack("s", "100"));
echo $str,"=",strlen($str),"byte n";
getascill($str);

The code is as follows

代码如下

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//a字符 $str=(pack("a*", "中国")); echo $str,"=",strlen($str),"字节n"; getascill($str); //h字符 $str=(pack("h*", "fffe")); echo $str,"=",strlen($str),"字节n"; getascill($str); //c字符 $str=(pack("c*", "55","56","57")); echo $str,"=",strlen($str),"字节n"; getascill($str); //i字符 短整形 32位 4个字节 64位8个字节 $str=(pack("i", "100")); echo $str,"=",strlen($str),"字节n"; getascill($str); //s字符 短整形 2个字节 $str=(pack("s", "100")); echo $str,"=",strlen($str),"字节n"; getascill($str); //l字符 长整形 4个字节 $str=(pack("l", "100")); echo $str,"=",strlen($str),"字节n"; getascill($str); //f字符 单精度浮点 4个字节 $str=(pack("f", "100")); echo $str,"=",strlen($str),"字节n"; getascill($str); //d字符 双精度浮点 8个字节 $str=(pack("d", "100")); echo $str,"=",strlen($str),"字节n"; getascill($str); function getascill($str) { $arr=str_split($str); foreach ($arr as $v) { echo $v,"=",ord($v),"n"; } echo "=============rnrn"; } ?>

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//a character
$str=(pack("a*", "China"));
echo $str,"=",strlen($str),"byte n";
getascill($str);
//h character
$str=(pack("h*", "fffe"));
echo $str,"=",strlen($str),"byte n";
getascill($str);
//c character
$str=(pack("c*", "55","56","57"));
echo $str,"=",strlen($str),"byte n";
getascill($str);

代码如下

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/* @ 另一种方法，使用ord()函数： @ 适用于 gb2312 编码: */ $str = "怎么将新闻的很长的标题只显示前面一些字，后面用.....来代替？"; function gb2312_substr($str, $limit) { $restr =''; for($i=0;$i $restr .= ord($str[$i])>127 ? $str[$i].$str[++$i] : $str[$i]; } return $restr; } /* @ 以下仅适用于 utf-8 编码; */ function utf8_substr($str, $limit) { $restr = ''; for($i=0;$i $restr .= ord($str[$i])>127 ? $str[$i].$str[++$i].$str[++$i] : $str[$i]; } return $restr; } //解释下上面第一个：chr(0)不是null,null是什么都没有，而chr(0)的值是0。表示成16进制是0x00，表示成二进制是00000000虽然chr(0)不会显示出什么，但是他是一个字符。虽然chr(0)不会显示出什么，但是他是一个字符。当汉字被截断时，根据编码规则他总是要把后边的其他字符拉过来一起作为汉字解释，这就是出现乱码的原因。 ?>

//i character short integer 32 bits 4 bytes 64 bits 8 bytes
$str=(pack("i", "100"));
echo $str,"=",strlen($str),"byte n";
getascill($str);

//l character long integer 4 bytes
$str=(pack("l", "100"));
echo $str,"=",strlen($str),"byte n";
getascill($str);

//f character single precision floating point 4 bytes
$str=(pack("f", "100"));
echo $str,"=",strlen($str),"byte n";
getascill($str); //d character double precision floating point 8 bytes
$str=(pack("d", "100"));
echo $str,"=",strlen($str),"byte n";
getascill($str); function getascill($str)
{
$arr=str_split($str);
foreach ($arr as $v)
{
echo $v,"=",ord($v),"n";
}
echo "=============rnrn";
}
?> For more details, please check: http://www.bKjia.c0m/phper/php-function/php-ord.htm Example 2

The code is as follows

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/* @ Another way, use the ord() function: @ Applies to gb2312 encoding: */ $str = "How to display only the first few words of a long news title and replace it with...?"; function gb2312_substr($str, $limit) { $restr =''; for($i=0;$i $restr .= ord($str[$i])>127 ? $str[$i].$str[++$i] : $str[$i]; } return $restr; } /* @The following only applies to utf-8 encoding; */ function utf8_substr($str, $limit) { $restr = ''; for($i=0;$i $restr .= ord($str[$i])>127 ? $str[$i].$str[++$i].$str[++$i] : $str[$i]; } return $restr; } //Explain the first one above: chr(0) is not null, null means nothing, and the value of chr(0) is 0. Expressed as hexadecimal, it is 0x00, and expressed as binary, it is 00000000. Although chr(0) will not display anything, it is a character. Although chr(0) does not display anything, it is a character. When a Chinese character is truncated, according to the encoding rules, he always has to pull the other characters behind as Chinese characters for interpretation. This is the reason why garbled characters appear. ?> http://www.bkjia.com/PHPjc/632246.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632246.htmlTechArticle Below we give two examples, both of which use ord to instantiate character ascii judgment to avoid the problem of Chinese garbled characters. For the function of this function, we can refer to http://www.111cn.net/phper/php/4103...