fflush
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();
?>
fgetc
(PHP 4, PHP 5)
fgetc — 从文件指针中读取字符
说明
string fgetc
( resource
$handle
)
返回一个包含有一个字符的字符串，该字符从 handle
指向的文件中得到。碰到 EOF 则返回 FALSE。
文件指针必须是有效的，必须指向由 fopen() 或 fsockopen() 成功打开的文件(并还未由 fclose() 关闭)。
Warning
此函数可能返回布尔值
FALSE，但也可能返回等同于 FALSE 的非布尔值，例如 0 或
""(空串)。请阅读 布尔类型章节以获取更多信息。应使用 ===
运算符 来测试此函数的返回值。
Example #1 fgetc() 例子
<?php
$fp = fopen('somefile.txt', 'r');
if (!$fp) {
echo 'Could not open file somefile.txt';
}
while (false !== ($char = fgetc($fp))) {
echo "$char\n";
}
?>
Note: 此函数可安全用于二进制对象。
参见 fread()，fopen()，popen()，fsockopen() 和 fgets()。
返回值
Returns a string containing a single character read from the file pointed
to by handle. Returns FALSE on EOF.
范例
Example #2 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";
}
?>
注释
Note: 此函数可安全用于二进制对象。
参见
- fread() - 读取文件（可安全用于二进制文件）
- fopen() - 打开文件或者 URL
- popen() - 打开进程文件指针
- fsockopen() - Open Internet or Unix domain socket connection
- fgets() - 从文件指针中读取一行
add a note
User Contributed Notes
fgetc
sfinktah at php dot spamtrak dot org
22-Mar-2011 06:33
alex at alexdemers dot me
11-May-2009 10:30
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);
}
?>
ktraas at gmail dot com (Kevin Traas)
23-Mar-2009 07:08
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"` ) );