{"id":1229,"date":"2021-04-19T02:09:24","date_gmt":"2021-04-19T02:09:24","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=1229"},"modified":"2021-09-04T11:13:27","modified_gmt":"2021-09-04T11:13:27","slug":"php-filesize","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-filesize\/","title":{"rendered":"PHP filesize"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you will learn how to use the PHP filesize()<\/code> function to get the size of a file.<\/p>\n\n\n\n

Introduction to the PHP filesize() function #<\/a><\/h2>\n\n\n\n

The filesize()<\/code> function returns the size of a given file in bytes:<\/p>\n\n\n

filesize ( string $filename ) : int|false<\/span><\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
The filesize()<\/code> function returns the size of the file specified by the $filename<\/code> in bytes. In case of an error, the function returns false<\/code>.<\/p>\n\n\n\n
PHP filesize() function example #<\/a><\/h2>\n\n\n\n
The following example uses the filesize()<\/code> function to get the size of the readme.txt<\/code> file in bytes:<\/p>\n\n\n
<?php<\/span>\n\n$filename = 'readme.txt'<\/span>;\necho<\/span> $filename,': '<\/span>, filesize($filename),' bytes'<\/span>;<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
readme<\/span>.txt<\/span>: 19 bytes<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
In practice, you will rarely use the bytes for showing the size of the file. To get the human-readable size of a file, you can use the following function:<\/p>\n\n\n
function<\/span> format_filesize<\/span>(int $bytes, int $decimals = 2<\/span>)<\/span>: string<\/span>\r\n<\/span>{\r\n    $units = 'BKMGTP'<\/span>;\r\n    $factor = floor((strlen($bytes) - 1<\/span>) \/ 3<\/span>);\r\n\r\n    return<\/span> sprintf(\"%.{$decimals}f\"<\/span>, $bytes \/ pow(1024<\/span>, $factor)) . $units[(int)$factor];\r\n}\r<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
  • Use the PHP filesize()<\/code> function to get the size of a file in bytes.<\/li><\/ul>\n
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