How to Write to a File Using PHP - ThoughtCo.
This lesson demonstrates how to perform read and write operations on a binary file in C programming language. We'll also discuss some of the benefits of working with binary files.
The fwrite() function in PHP is an inbuilt function which is used to write to an open file. The fwrite() function stops at the end of the file or when it reaches the specified length passed as a parameter, whichever comes first.
Using fwrite() and fread() to read and write data in files. Now, in case we have a lot of data elements or fields in the structure then writing the data or reading the data using the function fprintf() or fscanf() won’t be efficient. Hence we have another function fwrite() to write the structure data into the file and fread() to read the structure data from the file.
Because fwrite() may buffer output before writing it out to the stream, data from prior fwrite() calls may be lost where a subsequent call to fwrite() causes a failure when the buffer is written to the stream. fwrite() has the same restriction as any write operation for a read immediately following a write or a write immediately following a read.
In my code,i have to open my input text file, extract some strings from it and write to a text file.Again i extract some other strings and write it to another text file.like that i have to write to many text files depending on the text content.so i need a loop in which write operation is done to multiple files.i got problems with fid in the loop when using fwrite.please help.
Definition and Usage. The fwrite() writes to an open file. The function will stop at the end of the file (EOF) or when it reaches the specified length, whichever comes first.
Writes the C string pointed by format to the stream.If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. After the format parameter, the function expects at least as many additional arguments as specified by format.