fwrite Binary-safe file write &reftitle.description; intfalsefwrite resourcestream stringdata intnulllength&null; fwrite writes the contents of data to the file stream pointed to by stream. &reftitle.parameters; stream &fs.file.pointer; data The string that is to be written. length If length is an &integer;, writing will stop after length bytes have been written or the end of data is reached, whichever comes first. &reftitle.returnvalues; fwrite returns the number of bytes written, &return.falseforfailure;. &reftitle.errors; fwrite raises E_WARNING on failure. &reftitle.changelog; &Version; &Description; 8.0.0 length is nullable now. &reftitle.examples; ]]> &reftitle.notes; Writing to a network stream may end before the whole string is written. Return value of fwrite may be checked: ]]> On systems which differentiate between binary and text files (i.e. Windows) the file must be opened with 'b' included in fopen mode parameter. If stream was fopened in append mode, fwrites are atomic (unless the size of data exceeds the filesystem's block size, on some platforms, and as long as the file is on a local filesystem). That is, there is no need to flock a resource before calling fwrite; all of the data will be written without interruption. If writing twice to the file pointer, then the data will be appended to the end of the file content: ]]> &reftitle.seealso; fread fopen fsockopen popen file_get_contents pack