There are a lot of PHP beginners to intercept characters will use SUBSTR () function or mb_substr () function to intercept, the first Chinese must be garbled, the second performance is not good, the following I summed up a few custom Chinese text string interception without garbled instances.
Example 1
| The code is as follows |
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function Msubstr ($str, $start =0, $length, $charset = "Utf-8", $suffix =true)
{
if (function_exists ("Mb_substr"))
Return Mb_substr ($str, $start, $length, $charset);
ElseIf (function_exists (' iconv_substr ')) {
Return Iconv_substr ($str, $start, $length, $charset);
}
$re [' utf-8 '] = "/[x01-x7f]| [XC2-XDF] [x80-xbf]| [Xe0-xef] [X80-XBF] {2}| [Xf0-xff] [X80-XBF] {3}/";
$re [' gb2312 '] = "/[x01-x7f]| [Xb0-xf7] [xa0-xfe]/];
$re [' gbk '] = "/[x01-x7f]| [X81-xfe] [x40-xfe]/];
$re [' big5 '] = "/[x01-x7f]| [X81-xfe] ([X40-x7e]|xa1-xfe]) /";
Preg_match_all ($re [$charset], $STR, $match);
$slice = Join ("", Array_slice ($match [0], $start, $length));
if ($suffix) return $slice. " ...";
return $slice;
} |
Example 2
| The code is as follows |
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$start: Specifies the position at which to start intercepting the string, $length specifies the length of the Intercept character
function Substr2 ($string, $start, $length)
{
$len = strlen ($string);
if ($len > $length)
{
$str = ";
$len 1 = $start + $length; The location where the original string was intercepted
for ($i = $start; $i < $len 1; $i + +)
{
if (Ord (substr ($string, $i, 2)) > 0xa0)//in ASCII, 0xa0 denotes the beginning of the kanji
{
$str. =substr ($string, $i, 2);
$i + +;
}
Else
{
$str. =substr ($string, $i, 1);
}
}
return $str. ' ... ';
}
Else
{
return $string;
}
} ?> |
Add a simple, thinking the same (2010-5-31)
| The code is as follows |
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function Chinesesubstr ($str, $start, $len) {
$strlen = $start + $len;
for ($i =0; $i < $strlen; $i + +) {
if (Ord (substr ($str, $i, 1)) > 0xa0) {
$tmpstr. = substr ($str, $i, 2);
$i + +;
}else{
$tmpstr. = substr ($str, $i, 1);
}
}
return $tmpstr;
}
$str = "Waiting for your Wait wait you back";
Echo chinesesubstr ($str, 0, 19)
?> |
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