php 如何从字符串中删除所有数字？
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原文地址: http://stackoverflow.com/questions/14236148/
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How to remove all numbers from string?
提问by Gago Design
I'd like to remove all numbers from a string [0-9]. I wrote this code that is working:
我想从字符串 [0-9] 中删除所有数字。我写了这段有效的代码：
$words = preg_replace('/0/', '', $words ); // remove numbers
$words = preg_replace('/1/', '', $words ); // remove numbers
$words = preg_replace('/2/', '', $words ); // remove numbers
$words = preg_replace('/3/', '', $words ); // remove numbers
$words = preg_replace('/4/', '', $words ); // remove numbers
$words = preg_replace('/5/', '', $words ); // remove numbers
$words = preg_replace('/6/', '', $words ); // remove numbers
$words = preg_replace('/7/', '', $words ); // remove numbers
$words = preg_replace('/8/', '', $words ); // remove numbers
$words = preg_replace('/9/', '', $words ); // remove numbers
I'd like to find a more elegant solution: 1 line code (IMO write nice code is important).
我想找到一个更优雅的解决方案：1 行代码（IMO 编写好的代码很重要）。
The other code I found in stackoverflow also remove the Diacritics (á,?,?...).
我在 stackoverflow 中找到的其他代码也删除了变音符号 (á,?,?...)。
回答by dan-lee
For Western Arabic numbers (0-9):
对于西方阿拉伯数字 (0-9)：
$words = preg_replace('/[0-9]+/', '', $words);
For all numerals including Western Arabic(e.g. Indian):
对于包括西方阿拉伯语（例如Indian）在内的所有数字：
$words = '????';
$words = preg_replace('/\d+/u', '', $words);
var_dump($words); // string(0) ""
\d+matches multiple numerals.- The modifier
/uenables unicode string treatment. This modifier is important, otherwise the numerals would not match.
\d+匹配多个数字。- 修饰符
/u启用 unicode 字符串处理。这个修饰符很重要，否则数字将不匹配。
回答by hsz
Try with regex \d:
尝试使用正则表达式\d：
$words = preg_replace('/\d/', '', $words );
\dis an equivalent for [0-9]which is an equivalent for numbers range from 0to 9.
\d是一个等价物，[0-9]它是从0到 的数字的等价物9。
回答by Veger
Use some regex like [0-9]or \d:
使用一些正则表达式，如[0-9]或\d：
$words = preg_replace('/\d+/', '', $words );
You might want to read the preg_replace() documentationas this is directly shown there.
您可能想阅读preg_replace() 文档，因为它直接显示在那里。
回答by NaveenDA
Use Predefined Character Ranges
使用预定义的字符范围
echo $words= preg_replace('/[[:digit:]]/','', $words);
echo $words= preg_replace('/[[:digit:]]/','', $words);
回答by Dimpal Gohil
Regex
正则表达式
$words = preg_replace('#[0-9 ]*#', '', $words);
