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php 写文件操作的步骤分享

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Release： 2016-07-25 08:56:48
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本文介绍下，在php编程中对文件进行写操作的步骤，有需要的朋友，可以参学习下。

在php中，写入文件一般要经过如下的步骤： 1、首先，确定要写入文件的内容 $content = ‘你好’;

2、然后，打开文件（系统会自动建立这个空文件）

//假设新建的文件叫file.txt，而且在上级目录下。w表示‘写文件’，
$fp下面要用到，表示指向某个打开的文件。
$fp = fopen(’../file.txt’, ‘w’);
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3、将内容字符串写入文件 //$fp告诉系统要写入的文件，写入的内容是$content。

fwrite($fp, $content); //文件写入
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4、关闭文件 fclose($fp);

说明：PHP5中提供了更方便的函数file_put_contents， 因此以上四步可以缩减为：

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