用于 PHP 的 StringBuilder
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StringBuilder for PHP
提问by Mark
Has someone made a StringBuilderimplementation in PHP?
有没有人用StringBuilderPHP 实现过？
回答by Mark Baijens
Note:
笔记：
This answer is from 2010, there might be stringbuilders that can improve the performance by now (judging from the comments below). I have not worked with php for a long time so my knowledge is not up to date. This answer might be out dated.
这个答案是从 2010 年开始的，现在可能有 stringbuilders 可以提高性能（从下面的评论判断）。我很长时间没有使用 php，所以我的知识不是最新的。这个答案可能已经过时了。
Why do you want to use a StringBuilder? Strings in php are mutable. Therefore performance is not an issue.
为什么要使用 StringBuilder？php 中的字符串是可变的。因此性能不是问题。
Just build string like this
像这样构建字符串
$string = "start";
$string .= "appended string";
$string .= "appended string";
etc.
回答by RobertPitt
You can use sprintfwhich is only a basic version but requires no extra libraries, examples Follow
您可以使用sprintfwhich 只是一个基本版本，但不需要额外的库，示例如下
$String = "Firstname %s, lastname %s, Age %d";
echo sprintf($String,"Robert","Pitt",22);
And also handles type casting and position replacements:
并且还处理类型转换和位置替换：
$format = "The %2$s contains %1$d monkeys. That's a nice %2$s full of %1$d monkeys.";
sprintf($format, $num, $location);
All though i do like the look of jacob's answer :)
尽管我确实喜欢雅各布回答的样子:)
taker a look at the great functionality of t his function and its sister function here: http://php.net/manual/en/function.sprintf.php
在这里查看他的函数及其姊妹函数的强大功能：http: //php.net/manual/en/function.sprintf.php
回答by Jan Thom?
There are some implementations out there, however I don't see why you would need a StringBuilder in PHP,at least not for performance reasons. Plain string concatenation in PHP is faster than sprintf or the impelementation Jacob suggested.
有一些实现，但是我不明白为什么您需要 PHP 中的 StringBuilder，至少不是出于性能原因。PHP 中的纯字符串连接比 sprintf 或 Jacob 建议的实现更快。
回答by AMH
You don't need StringBuilder or StringBuffer in PHP , PHP is super handy I offer you , using from hereDoc and NowDoc if you you wish to keep PyString :
PHP 中不需要 StringBuilder 或 StringBuffer ，PHP 非常方便，我为您提供，如果您希望保留 PyString ，请使用 hereDoc 和 NowDoc ：
$YourString = "start";
$YourString .= <<<'EOD'
appended string
Example of string
spanning multiple lines
using nowdoc syntax.
EOD;
$YourString .= <<<buffer
appended string
Example of string
spanning multiple lines
using heredoc syntax.
appended string
appended string
buffer;
回答by Dimitry K
Answer of @Amir, gave me inspiration to the fact that in PHP if you want 'named parameters' or 'positional' parameters, you don't need sprintf, but HERE_DOC/NOW_DOC works perfect. You can evenuse this inside of a classfor properties and call getters.
@Amir 的回答给了我灵感，即在 PHP 中，如果您想要“命名参数”或“位置”参数，则不需要sprintf，但 HERE_DOC/NOW_DOC 可以完美运行。您甚至可以在类中使用它来获取属性并调用 getter。
class MyClass{
private $property;
private $stock; // some other object with getter 'getSomeProperty()'
function __toString(){
$localvar = 'Localvar';
$localvar2 = 'Localvar2';
return <<<HERE_DOC
{{
fqsn: {$this->stock->getSomeProperty()},
property: {$this->property},
localvar: {$localvar},
localvar2: $localvar2
}}
HERE_DOC;
} // end __toString()
} // end MyClass
