PHP program to remove Chinese and English spaces at the beginning and end of a string_PHP tutorial

The following article summarizes several PHP program examples for removing Chinese and English spaces at the beginning and end of strings. Here, regular replacement and trim series functions are used to delete them. Let’s take a look.

Example 1.trim function removes spaces

The trim() function is used to remove spaces at the beginning and end of a string, and returns the string with the spaces removed. The syntax is as follows:
string trim(string str[,string charlist]);
The ltrim() function is used to remove spaces on the left side of a string or specify a string. The syntax is as follows:
string ltrim(string str[,string charlist]);
The rtrim() function is used to remove spaces and special characters on the right side of a string. The syntax is as follows:
string rtrim(string str[,string charlist]);

a,b,c In SQL, the function trim() is used to remove leading and trailing spaces, ltrim() is to remove spaces on the left side of a string, and rtrim() is used to remove spaces on the right side of a string.

The code is as follows

代码如下	复制代码
$a="(a,b,c,)"; echo $a." "; //输出：(a,b,c,) $b=trim($a,"()"); //去除字符串首尾含有的字符“(”或“)” echo $b." "; //输出：a,b,c, $c=trim($a,"(,)"); //去除字符串首尾含有的字符“(”、“,”或“)” echo $c." "; //输出：a,b,c   ?>

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$a="(a,b,c,)";
echo $a."
"; //Output: (a,b,c,)
$b=trim($a,"()"); //Remove the characters "(" or ")" at the beginning and end of the string echo $b."
"; //Output: a,b,c,

$c=trim($a,"(,)"); //Remove the characters "(", "," or ")" at the beginning and end of the string

echo $c."
"; //Output: a,b,c

?>

代码如下	复制代码
function  mbTrim($str)  {          return mb_ereg_replace('(^(　| )+|(　| )+$)', '', $str);  }

Output result:

(a,b,c,)

代码如下	复制代码
$str="　　　 　 www.bKjia.c0m 　　　　"; $str = mb_ereg_replace('^(　| )+', '', $str); $str = mb_ereg_replace('(　| )+$', '', $str); echo mb_ereg_replace('　　', "n　　", $str); ?>

a,b,c,

Example 2. Use str_replace to replace

The code is as follows

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function mbTrim($str) {             return mb_ereg_replace('(^(　| )+|(　| )+$)', '', $str); }

Example 3.str_replace regular replacement

The code is as follows

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$str="　　　www.bKjia.c0m　　"; <🎜> $str = mb_ereg_replace('^(　| )+', '', $str); <🎜> $str = mb_ereg_replace('(　| )+$', '', $str); <🎜> echo mb_ereg_replace('　', "n　", $str); <🎜> ?> http://www.bkjia.com/PHPjc/632753.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632753.htmlTechArticleThe following article summarizes several PHP program examples for removing Chinese and English spaces at the beginning and end of strings. It is useful here. Let’s take a look at regular replacement and trim series function deletion. For example...