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);
}
?>
(PHP 4, PHP 5, PHP 7, PHP 8)
fgetc — Lê um caractere do ponteiro de arquivo
streamO ponteiro de arquivo deve ser válido e deve apontar para um arquivo aberto com sucesso por fopen() ou fsockopen() (e ainda não fechado por fclose()).
Retorna uma string contendo um único caractere lido do ponteiro do arquivo
passado por stream. Retorna false em EOF.
Esta função pode
retornar o valor booleano false, mas também pode retornar um valor não booleano que pode ser
avaliado como false. Leia a seção sobre Booleanos para mais
informações. Use o operador
=== para testar o valor retornado por esta
função.
Exemplo #1 Um exemplo da fgetc()
<?php
$fp = fopen('algumarquivo.txt', 'r');
if (!$fp) {
echo 'Não é possivel abrir algumarquivo.txt';
}
while (false !== ($char = fgetc($fp))) {
echo "$char\n";
}
?>Nota: Esta função é compatível com dados binários.
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);
}
?>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:
$ans = strtolower( trim( `bash -c "read -n 1 -t 10 ANS ; echo \\\$ANS"` ) );To read a single key-press in CLI mode, you can either use ncurses (which will probably require additional modules for PHP) or get nasty with the *nix "/bin/stty" command)
<?php
function stty($options) {
exec($cmd = "/bin/stty $options", $output, $el);
$el AND die("exec($cmd) failed");
return implode(" ", $output);
}
function getchar($echo = false) {
$echo = $echo ? "" : "-echo";
# Get original settings
$stty_settings = preg_replace("#.*; ?#s", "", stty("--all"));
# Set new ones
stty("cbreak $echo");
# Get characters until a PERIOD is typed,
# showing their hexidecimal ordinal values.
printf("> ");
do {
printf("%02x ", ord($c = fgetc(STDIN)));
} while ($c != '.');
# Return settings
stty($stty_settings);
}
getchar();
?>You can't just simple print separated characters of a text which is encoded in multibyte character set like this;
Because fgetc() will break each multibyte character on its every byte. Consider this example:
<?php
$path = 'foo/cyrillic.txt';
$handle = fopen($path, 'rb');
while (FALSE !== ($ch = fgetc($handle))) {
$curs = ftell($hanlde);
print "[$curs:] $ch\n";
}
/* The result will be something like this:
<
[1]: <
[2]: h
[3]: 2
[4]: >
[5]: �
[6]: �
[7]: �
[8]: �
[9]: �
[10]: �
[11]:
[12]: �
[13]: �
[14]: �
[15]: �
[16]: �
*/ ?>
I don't think this is the best, but it can be a workaround:
<?php
$path = 'path/to/your/file.ext';
if (!$handle = fopen($path, 'rb')) {
echo "Can't open ($path) file';
exit;
}
$mbch = ''; // keeps the first byte of 2-byte cyrillic letters
while (FALSE !== ($ch = fgetc($handle))) {
//check for the sign of 2-byte cyrillic letters
if (empty($mbch) && (FALSE !== array_search(ord($ch), Array(208,209,129)))) {
$mbch = $ch; // keep the first byte
continue;
}
$curs = ftell($handle);
print "[$curs]: " . $mbch . $ch . PHP_EOL;
// or print "[$curs]: $mbch$ch\n";
if (!empty($mbch)) $mbch = ''; // erase the byte after using
}
?>