Table of Contents
回复讨论(解决方案)
Home Backend Development PHP Tutorial php中如何对输出的文章限制字数,剩余的用“.”表示?

php中如何对输出的文章限制字数,剩余的用“.”表示?

Jun 23, 2016 pm 01:45 PM

各位哥哥,小女子刚学php,在对文章内容进行输出时,如图:
由于文章内容太多,搞得整个表格都变形了,所以就想通过只输出一部分,其他内容用省略号表示,如图:
也在网上找了很多方法都行不通的,CSS啊,php中substr等函数那些都搞不好,希望能得到帮助!谢谢


回复讨论(解决方案)

echo mb_strlen($news['n_content'], 'utf-8') > 9 ? mb_substr($news['n_content'], 0, 9, 'utf-8').'....' : $news['n_content'];
Copy after login

楼上的要确保楼主打开了extension=php_mbstring.dll ;

/** * 字符串截取 * */function sub_str($str, $length = 0, $append = true){    $str = trim($str);    $strlength = strlen($str);    if ($length == 0 || $length >= $strlength)    {        return $str;  //截取长度等于0或大于等于本字符串的长度,返回字符串本身    }    elseif ($length < 0)  //如果截取长度为负数    {        $length = $strlength + $length;//那么截取长度就等于字符串长度减去截取长度        if ($length < 0)        {            $length = $strlength;//如果截取长度的绝对值大于字符串本身长度,则截取长度取字符串本身的长度        }    }    if (function_exists('mb_substr'))    {        $newstr = mb_substr($str, 0, $length, EC_CHARSET);    }    elseif (function_exists('iconv_substr'))    {        $newstr = iconv_substr($str, 0, $length, EC_CHARSET);    }    else    {        //$newstr = trim_right(substr($str, 0, $length));        $newstr = substr($str, 0, $length);    }    if ($append && $str != $newstr)    {        $newstr .= '...';    }    return $newstr;}
Copy after login

mb_strlen字符截取

很多开源网站都有这样函数

mb_strlen

以下摘自thinkphp框架源码;

    /**     * 字符串截取,支持中文和其他编码     * @static     * @access public     * @param string $str 需要转换的字符串     * @param string $start 开始位置     * @param string $length 截取长度     * @param string $charset 编码格式     * @param string $suffix 截断显示字符     * @return string     */    static public function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) {        if(function_exists("mb_substr"))            $slice = mb_substr($str, $start, $length, $charset);        elseif(function_exists('iconv_substr')) {            $slice = iconv_substr($str,$start,$length,$charset);        }else{            $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, $length));        }        return ($suffix && (mb_strlen($str,$charset) > $length)) ? $slice.'...' : $slice;    }
Copy after login

这个可以用css做到,卤煮可以百度 css控制字数

感谢1楼哥哥的指点,问题已经解决!

也感谢二楼的哥哥,提醒用1楼哥哥的方法时,要开启php.ini里面的“extension=php_mbstring.dll ”,

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Explain the concept of late static binding in PHP. Explain the concept of late static binding in PHP. Mar 21, 2025 pm 01:33 PM

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

How to send a POST request containing JSON data using PHP's cURL library? How to send a POST request containing JSON data using PHP's cURL library? Apr 01, 2025 pm 03:12 PM

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles