Using PHP fwrite() to Write Data to Files
This article explains how the PHP fwrite() function writes strings to an open file handle, describes its parameters and return values, and provides a complete example demonstrating file existence checks, opening in append mode, writing content, handling errors, and closing the file.
fwrite() writes a string to an open file pointer, optionally limiting the number of bytes written.
Parameters: handle – the file resource returned by fopen() ; string – the data to write; length – optional maximum number of bytes to write.
Return value: the number of bytes written, or FALSE on error.
Example usage:
The script first checks that the target file exists and is writable, opens it in append mode, writes the specified content, reports success or failure, and finally closes the file handle.
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