How to remove spaces at the beginning and end of characters in PHP_PHP Tutorial

There are many ways to delete character spaces in PHP. Let me introduce the processing method using the three functions of mb_ereg_replace() and ltrim, rtrim, and trim.

Example

Some friends will ask if PHP has its own functions. Let’s look at examples below

The code is as follows

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

Copy code

$str=" Web page production tutorial www.bKjia.c0m ";
$str = mb_ereg_replace('^(| )+', '', $str);
$str = mb_ereg_replace('(　| )+$', '', $str);
echo mb_ereg_replace('　', "n　", $str);
?>

Some friends may not understand mb_ereg_replace(). Let’s introduce the mb_ereg_replace function

代码如下	复制代码
$str=" 去除前后空格 "; echo "方括号中为原始字符串：[".$str."] "; echo "原始字符串长度：".strlen($str)." "; $str1=ltrim($str); echo "执行ltrim()之后的长度：".strlen($str1)." "; $str2=rtrim($str); echo "执行rtrim()之后的长度：".strlen($str2)." "; $str3=trim($str); echo "执行trim()之后的长度：".strlen($str3)." "; echo "去掉首尾空格之后的字符串：[".$str3."]"; ?>

mb_ereg_replace() We only need to pay attention to the mb in front. Some friends who have used character conversion will understand at a glance that this function supports Chinese.

Example

The code is as follows

Copy code

$str="Remove leading and trailing spaces"; echo "The original string in square brackets: [".$str."] "; echo "Original string length:".strlen($str)." "; $str1=ltrim($str); echo "The length after executing ltrim():".strlen($str1)." "; $str2=rtrim($str); echo "The length after executing rtrim():".strlen($str2)." "; $str3=trim($str); echo "The length after executing trim():".strlen($str3)." "; echo "The string after removing the leading and trailing spaces: [".$str3."]"; ?> Summary: There are multiple solutions to the same problem. Just like when we delete character spaces, we can use two different methods to achieve the same effect. http://www.bkjia.com/PHPjc/629135.html www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/629135.htmlTechArticleThere are many ways to delete character spaces in php. Let me introduce the use of mb_ereg_replace() and ltrim, rtrim , trim processing methods of these three functions. Example code is as follows Copy code ? $...