Replace a string in JavaScript and PHP_问答_开发者

开发者 https://www.devze.com 2023-01-10 07:40 出处：网络

How can I replace this character | in JavaScript? <html> <body> <s开发者_如何转开发cript type=\"text/javascript\">

相关专题：javascript php

How can I replace this character | in JavaScript?

<html>
<body>

<s开发者_如何转开发cript type="text/javascript">

var str="data|data|data";
document.write(str.replace(/|/g,"<br />"));

</script>

In the output of given code, every character has the "< br />"

I don't know what is wrong with my code.. :)

Also, for PHP, I want the function to use if the input is

|string||

and the output should be

string

only. I want only the outer part of the string in PHP to be subtituted: ||hel||lo|| would become hel||lo.

Could I use trim()? I think trim() only applies to white spaces.

~~You don't need a regular expression for this - if you pass a string as the first argument to replace(), it will be replaced literally:~~

~~var str='data|data|data'; str = str.replace('|', '');~~

...but it will only replace the first match. For a global replace, you need to specify the global flag:

var str='data|data|data';
var re = new RegExp('\|','g'); // G is the 'global' flag
str = str.replace(re,'');

In PHP, str_replace() works with string literals:

$str='data|data|data';
$str = str_replace('|', '', $str);
// $str == datadatadata

If you only want to remove the outer delimiters, use trim():

$str='|||data|data||data|';
$str = trim($str,'|');
// $str == 'data|data||data';

JavaScript:

You have to escape the pipe symbol:

document.write(str.replace(/\|/g,"<br />"));
//                       ---^

PHP:

You can pass another parameter to trim() that specifies which characters to remove:

$str = trim($str, '| ');

If you also want to remove the character in the middle of the string you can use str_replace():

$str = str_replace('|', '', $str);

you need to escape the | character because it is used as OR in regex /a|b/ matches either a OR b. Try /\|/

Edit: To achieve wour last goal try doing it this way (alot of regex,I know):

document.write(str.replace(/(\|)+$/g,"").replace(/^(\|)+/g,"").replace(/(\|)+/g,"<br />"));

In Javascript, you'll need to escape that pipe character:

alert("data|data|data".replace(/\|/g,"<br />"))

Replace a string in JavaScript and PHP