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    fgetc

    (PHP 4, PHP 5, PHP 7)

    fgetc — Gets character from file pointer

    설명

    string fgetc ( resource $handle )

    Gets a character from the given file pointer.

    인수

    handle

    파일 포인터는 fopen(), fsockopen()을 통하여 성공적으로 열려, fclose()로 닫지 않은 유효한 파일이여야 합니다.

    반환값

    Returns a string containing a single character read from the file pointed to by handle. Returns FALSE on EOF.

    Warning

    이 함수는 논리 FALSE를 반환하지만, 논리 FALSE로 취급할 수 있는 다른 값을 반환할 수 있습니다. 자세한 정보는 논리형 섹션을 참고하십시오. 이 함수의 반환값을 확인하려면 === 연산자를 이용하십시오.

    예제

    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";
    }
    ?>

    주의

    Note: 이 함수는 바이너리 안전입니다.

    참고

    • 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

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    User Contributed Notes 5 notes

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    11
    alex at alexdemers dot me
    15 years ago
    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);
    }

    ?>
    up
    3
    seraclimov at yandex dot ru
    6 years ago
    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
    }
    ?>
    up
    7
    ktraas at gmail dot com (Kevin Traas)
    15 years ago
    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"` ) );
    up
    4
    sfinktah at php dot spamtrak dot org
    13 years ago
    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();
    ?>
    up
    0
    Anonymous
    7 years ago
    If you call fgetc(HANDLE) multiple times you must clear buffer before, thus get all unwanted chars to the new new line character.

    while (true) {

        //clear buffer - read all unwanted characters
        while(fgetc(STDIN) != "\n");
       
        //get first character from STDIN
        $first = fgetc(STDIN);
    }
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