PHP：替换所有实例
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PHP: Replace all instances
提问by lemon
I have a chatlog file that looks like this (name represents screenames and text is their chat string)
我有一个看起来像这样的聊天记录文件（名称代表屏幕名称，文本是他们的聊天字符串）
name: some text
name2: more text
name: text
name3: text
I want to color all names up to the :red.
For example: <font color=red>myname:</fontcolor> helloHow would I do this?
我想把所有的名字都涂成:红色。
例如：<font color=red>myname:</fontcolor> hello我该怎么做？
I'm not sure why, but this code colors everything afterthe colon
我不知道为什么，但是这段代码在冒号之后给所有东西上色
echo preg_replace('/(.*?):/', "<font color=#F00></font>:", $output);
回答by Bassem
A correct answer to this question has been provided previously:
之前已经提供了对这个问题的正确答案：
Look at the second answer:
看第二个回答：
PHP: insert text up to delimiter
In addition, your implementation is wrong, look at the regular expression it should start with ^ :
另外，你的实现是错误的，看看它应该以 ^ 开头的正则表达式：
echo preg_replace('/(.*?):/', "<font color=#F00></font>:", $output);
Should be:
应该：
echo preg_replace('/^(.*?):/', "<font color=#F00></font>:", $output);
回答by Hosh Sadiq
try:
尝试：
echo preg_replace('/^(.*?):(.*?)$/s', "<font color=#F00>\1</font>:\2", $output);
EDIT: This should work (tried it):
编辑：这应该有效（尝试过）：
trim(preg_replace("/(?:\n)(.*?):(.*?)/s", "<font color=#F00>\1</font>:\2", "\n".$str))
Final try, maybe try to explode it instead:
最后的尝试，也许尝试爆炸它：
<?php
$content = 'name: some text
name2: more text
name: text
name3: text';
$tmp = explode("\n", $content);
for($i = 0; $i < count($tmp); $i ++) {
$tmp[$i] = '<span style="color:#F00">'.str_replace(':', '</span>:', $tmp[$i], 1);
}
echo implode("\n", $tmp);
?>
This does assume that whatever is before the colon, it won't have another colon.
这确实假设冒号之前的任何内容都不会有另一个冒号。
My bad, I misunderstood str_replace()'s last parameter. Try this:
糟糕，我误解了 str_replace() 的最后一个参数。尝试这个：
<?php
$tmp = explode("\n", $content);
for($i = 0; $i < count($tmp); $i ++) {
$tmp2 = explode(':', $tmp[$i]);
$tmp2[0] = '<span style="color:#F00">'.$tmp2[0].'</span>';
$tmp[$i] = implode(':', $tmp2);
}
echo implode("\n", $tmp);
回答by steve
put the : inside the font tag after $1
将 : 放在 $1 之后的字体标签中
echo preg_replace('/^(.*?):/', "<font color=#F00>:</font>", $output);
回答by Mr Coder
Try this
尝试这个
echo preg_replace('/([a-zA-Z0-9]*):/', "<font color=#F00></font>:", $output);
回答by mario
Make the regex more specific:
使正则表达式更具体：
= preg_replace('/^(\w+):/m', ...
Or if usernames can contain non-alphanum symbols:
或者，如果用户名可以包含非字母数字符号：
= preg_replace('/^(\S+):/m', "<b></b>:", $output);
