你们如何在位于其左边有一封信的场所和一些右边的场所做一个reg?
在过去的一天里,我做了许多工作,我最多可以找到“字母空间号码”,但我不知道如何找到这封信与编号之间的空间。 我要用 com子取代这一空间。
E.G:
The big red Fox 283 brown balls
将:
The big red Fox,283 brown balls
事先感谢你回答这一问题。 如果你解释答案如何运作,将非常感谢。
你们如何在位于其左边有一封信的场所和一些右边的场所做一个reg?
在过去的一天里,我做了许多工作,我最多可以找到“字母空间号码”,但我不知道如何找到这封信与编号之间的空间。 我要用 com子取代这一空间。
E.G:
The big red Fox 283 brown balls
将:
The big red Fox,283 brown balls
事先感谢你回答这一问题。 如果你解释答案如何运作,将非常感谢。
http://php.net/manual/en/Function.preg-replace.php rel=“nofollow” a. 履行以下职能:
$string = The big red Fox 283 brown balls ;
preg_replace( /([a-zA-Z]) ([0-9])/ , $1,$2 , $string);
<代码>[a-zA-Z] part of the regexcompes any letter,[0-9]
对数。 <代码>/[a-zA-Z][0-9]/共同表示,我们希望与空间之后的任何信件相匹配,然后是一位数字。
这一工作应当:
$str = The big red Fox 283 brown balls ;
$regex = /([a-zA-Z])s(d)/ ;
$str = preg_replace( $regex, $1,$2 , $str );
你们是否做了这项工作?
<?php
$subject = "The big red Fox 283 brown balls";
$pattern = "/ [0-9]/";
$replacement = ",$0";
echo preg_replace($pattern, $replacement, $subject);
?>
页: 1
为什么没有人喜欢lookarounds ? 他们对这项任务来说是完美的,你不必与捕获团体合作。
preg_replace( /(?<=[a-z]) (?=[0-9])/i , , , $string);
见http://regexr.com?2v78f”rel=“nofollow”>Regexr 。
我将品级减为<代码>[a-z],并连同缩略语文本<代码>i,在结尾处也与上封信相匹配。
Use /dsw/
to match that sequence.
Also if you want to test your regular expressions you can use sites like http://rubular.com/
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