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    fgetc

    (PHP 4, PHP 5, PHP 7)

    fgetc — Gets character from file pointer

    Descrierea

    fgetc ( resource $stream ) : string|false

    Gets a character from the given file pointer.

    Parametri

    stream

    Indicatorul fișierului trebuie să fie valid și trebuie să indice la un fișier deschis cu succes cu ajutorul fopen() sau fsockopen() (și să nu fie închis cu fclose()).

    Valorile întoarse

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

    Avertizare

    Această funcție poate întoarce valoarea Boolean false, dar poate de asemenea întoarce o valoare non-Boolean care evaluează în false. Vă rugăm să citiți secțiunea despre tipul Boolean pentru informații suplimentare. Utilizați operatorul === pentru a verifica valoarea întoarsă de această funcție.

    Exemple

    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";
    }
    ?>

    Note

    Notă: Această funcție acceptă și date binare.

    A se vedea și

    • 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

    up
    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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