FTELL(3) 1 FTELL(3)ftell - Returns the current position of the file read/write pointer
SYNOPSIS
int ftell (resource $handle)
DESCRIPTION
Returns the position of the file pointer referenced by $handle.
PARAMETERS
o $handle
- The file pointer must be valid, and must point to a file successfully opened by fopen(3) or popen(3). ftell(3) gives undefined
results for append-only streams (opened with "a" flag).
RETURN VALUES
Returns the position of the file pointer referenced by $handle as an integer; i.e., its offset into the file stream.
If an error occurs, returns FALSE.
Note
Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results
for files which are larger than 2GB.
EXAMPLES
Example #1
ftell(3) example
<?php
// opens a file and read some data
$fp = fopen("/etc/passwd", "r");
$data = fgets($fp, 12);
// where are we ?
echo ftell($fp); // 11
fclose($fp);
?>
SEE ALSO fopen(3), popen(3), fseek(3), rewind(3).
PHP Documentation Group FTELL(3)
Check Out this Related Man Page
REWIND(3) 1 REWIND(3)rewind - Rewind the position of a file pointerSYNOPSIS
bool rewind (resource $handle)
DESCRIPTION
Sets the file position indicator for $handle to the beginning of the file stream.
Note
If you have opened the file in append ("a" or "a+") mode, any data you write to the file will always be appended, regardless of the
file position.
PARAMETERS
o $handle
- The file pointer must be valid, and must point to a file successfully opened by fopen(3).
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
rewind(3) overwriting example
<?php
$handle = fopen('output.txt', 'r+');
fwrite($handle, 'Really long sentence.');
rewind($handle);
fwrite($handle, 'Foo');
rewind($handle);
echo fread($handle, filesize('output.txt'));
fclose($handle);
?>
The above example will output something similar to:
Foolly long sentence.
SEE ALSO fread(3), fseek(3), ftell(3), fwrite(3).
PHP Documentation Group REWIND(3)
Hello friends,
I need help with ftell function in my programme, I can't figure out why I am not getting the file position what I supposed to get
Here is my code
void read_line(void *fh, double *input_re, double *input_im){
double a, b;
char s;
int n;
... (3 Replies)
Hello All,
I tried to test a sample fread example to read a complete file
and the code is
#include <stdio.h>
#include <stdlib.h>
int main () {
FILE * pFile;
long lSize;
char * buffer;
size_t result;
pFile = fopen ( "test.xml" , "rb" );
if (pFile==NULL) {fputs ("File... (11 Replies)
5Thank you to those who responded.
After a crazy amount of troubleshooting and getting hints and feedback from others, I was so darn determined to get on with my tutorials and I found the solution myself.
Keyword search: php and 'Mac computer' and fopen and chmod.
Using:php and Mac and... (1 Reply)
Thank you to those who responded.
After a crazy amount of troubleshooting and getting hints and feedback from others, I was so darn determined to get on with my tutorials and I found the solution myself.
Keyword search: php and 'Mac computer' and fopen and chmod.
Using: php and Mac and... (2 Replies)