I put "php fread 8192" into a search engine and it returns the PHP manual page for fread. The manual page says why it happens, and has two distinct examples that will solve your problem. Last edited by boughtonp; 04-26-2021 at 08:05 AM. 1 members found this post helpful. 04-27-2021, 08:16 PM What I'm trying to accomplish, is to read a number of bytes, and then go back to where I was before I read. And I'm trying to avoid using arithmetic (ftell, fread, ftell, subract, fseek), since a file could potentially be larger than PHP_INT_MAX and potentially mess that up. fread () は、 ファイルポインタが現在指している位置から読み込みを開始することに注意しましょう。 ポインタの現在位置を調べるには ftell () を、 そしてポインタの位置を巻き戻すには rewind () を使用します。 参考 fwrite () - バイナリセーフなファイル書き込み処理 fopen () - ファイルまたは URL をオープンする fsockopen () - インターネット接続もしくは Unix ドメインソケット接続をオープンする popen () - プロセスへのファイルポインタをオープンする fgets () - ファイルポインタから 1 行取得する fgetss () - ファイルポインタから 1 行取り出し、HTML タグを取り除く You should *always* be prepared to call fread () multiple times until you have read all the data. The only exception to this rule is when reading from a local file, for historical reasons. The 8192 magic number is the chunk size used internally by PHP. If you don't want to write a loop to read the data, use stream_get_contents (). As it turned out the support team did not quite know what they were talking about. They do not prevent access from php files, but they do prevent any access from other countries. And since my web-hotel is located abroad, it gets blocked. So now I have placed a php file on a domestic server, and my web-site uses that php to access the data. From: roger_dupere@hotmail.com: Date: Thu, 13 Nov 2003 18:50:51 +0000: Subject: note 37400 added to function.fread: Groups: php.notes Parameters. stream. The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).. fields. An array of string s.. separator. The optional separator parameter sets the field delimiter (one single-byte character only).. enclosure PHP Manual fread (PHP 4, PHP 5) fread — Binary-safe file read Description string fread ( resource $handle , int $length ) fread () reads up to length bytes from the file pointer referenced by handle . Reading stops as soon as one of the following conditions is met: length bytes have been read EOF (end of file) is reached Description: ------------ When the bzip2.decompress filter is applied to a stream, the fread () function does not detect decoding errors on a corrupted file and keeps instead returning the empty string or garbage. The following script illustrates 3 distinct cases. Checking what really happens inside the php_bz2_decompress_filter () function, in [2016-01-02 16:01 UTC] salsi at icosaedro dot it Description: ----- When the bzip2.decompress filter is applied to a stream, the fread() function does not detect decoding errors on a corrupted file and keeps instead returning the empty string or garbage. $filefill = fread ($fp, 100000000); //will take a long time on a very small file. if you add another 0, it will cause a "Internal Server Error" - this is not surprising. computers dont deal well with BIG numbers. i could not get php to re-create the error where it silently did not work. [2001-08-06 01:05 UTC] sniper@php.net Return values: This function returns the string read from the file on success or false on failure. Note: It make sure the file used in below program named as gfg.txt should have read permissions. Below Programs illustrate the SplFileObject