fflush
The best and simplest way to get input from a user in the CLI with only PHP is to use fgetc() function with the STDIN constant:
<?php
echo 'Are you sure you want to quit? (y/n) ';
$input = fgetc(STDIN);
if ($input == 'y')
{
exit(0);
}
?>
fgetc
(PHP 4, PHP 5)
fgetc — Gets character from file pointer
Description
string fgetc
( resource $handle
)
Gets a character from the given file pointer.
Parameters
- handle
-
The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).
Return Values
Returns a string containing a single character read from the file pointed to by handle . Returns FALSE on EOF.
Warning
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.
Examples
Example #1 A fgetc() example
<?php
$fp = fopen('somefile.txt', 'r');
if (!$fp) {
echo 'Could not open file somefile.txt';
}
while (false !== ($char = fgetc($fp))) {
echo "$char\n";
}
?>
Notes
Note: This function is binary-safe.
See Also
- fread() - Binary-safe file read
- fopen() - Opens file or URL
- popen() - Opens process file pointer
- fsockopen() - Open Internet or Unix domain socket connection
- fgets() - Gets line from file pointer
add a note
User Contributed Notesfgetc
alex at alexdemers dot me
11-May-2009 05:30
11-May-2009 05:30
ktraas at gmail dot com (Kevin Traas)
24-Mar-2009 03:08
24-Mar-2009 03:08
I was using command-line PHP to create an interactive script and wanted the user to enter just one character of input - in response a Yes/No question. Had some trouble finding a way to do so using fgets(), fgetc(), various suggestions using readline(), popen(), etc. Came up with the following that works quite nicely:
$ans = strtolower( trim( `bash -c "read -n 1 -t 10 ANS ; echo \\\$ANS"` ) );