PHP writing file implementation skills sharing_PHP tutorial-PHP Tutorial-php.cn

PHP writing file implementation skills sharing_PHP tutorial

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Release： 2016-07-15 13:34:23

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We know that in

PHP writes the file to determine whether it can be written:

< ?php

$file = 'dirlist.php';
if (is_writable($ file)
== false) {
die("I am a chicken, I can't");
}
?>

If you can write, you can use the file_put_contents function to write files in PHP:

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php  </span></span></li><li><span>$</span><span class="attribute">file</span><span> = </span><span class="attribute-value">'dirlist.php'</span><span>;  </span></li><li class="alt"><span>if (is_writable($file) == false) {  </span></li><li><span>die('我是鸡毛,我不能');  </span></li><li class="alt"><span>}  </span></li><li><span>$</span><span class="attribute">data</span><span> = </span><span class="attribute-value">'我是可鄙,我想要'</span><span>;  </span></li><li class="alt"><span>file_put_contents ($file, $data);  </span></li><li><span class="tag">?></span><span> </span></span></li>
<li class="alt"><span> </span></li>
</ol>

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The file_put_contents function is in php5 The newly introduced function (if you don’t know it exists, use the function_exists function to determine it first) cannot be used in lower versions of PHP. You can use the following method to write files in PHP:

<ol class="dp-xml">
<li class="alt"><span><span>$</span><span class="attribute">f</span><span> = </span><span class="attribute-value">fopen</span><span>($file, 'w');  </span></span></li>
<li><span>fwrite($f, $data);  </span></li>
<li class="alt"><span>fclose($f);  </span></li>
</ol>

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