open - php gd create image from text

Error fatal de PHP: llamada a una función no definida imagettftext()

Question

¿Por qué recibo el error PHP Fatal error: Call to undefined function imagettftext() Error PHP Fatal error: Call to undefined function imagettftext() en la línea 29?

<?php
ob_start();
session_start();

$strings = ''123456789'';
$i = 0;
$characters = 6;
$code = '''';
while ($i < $characters)
{ 
    $code .= substr($strings, mt_rand(0, strlen($strings)-1), 1);
    $i++;
} 

$_SESSION[''captcha''] = $code;

//generate image
$im = imagecreatetruecolor(124, 40);
$foreground = imagecolorallocate($im, 0, 0, 0);
$shadow = imagecolorallocate($im, 173, 172, 168);
$background = imagecolorallocate($im, 255, 255, 255);

imagefilledrectangle($im, 0, 0, 200, 200, $background);

// use your own font!
$font = ''monofont.ttf'';

//draw text:
imagettftext($im, 35, 0, 9, 28, $shadow, $font, $code);
imagettftext($im, 35, 0, 2, 32, $foreground, $font, $code);     

// prevent client side  caching
header("Expires: Wed, 1 Jan 1997 00:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");

//send image to browser
header ("Content-type: image/png");
imagepng($im);
imagedestroy($im);
?>`

Mi información de PHP:

Answer 1

De acuerdo con la entrada del manual de PHP para imagettftext() :

Esta función requiere tanto la biblioteca GD como la biblioteca »FreeType.

Debe faltar una o las dos bibliotecas requeridas en su compilación de PHP.

Answer 2

Resuelvo el mismo problema en mi entorno docker php:7-fpm , y php:7-fpm la solución aquí:

Si usa Dockerfile para configurar el entorno

# more Dockerfile  
FROM php:fpm 
RUN apt-get update && apt-get install -y /
    libfreetype6-dev /
        libmcrypt-dev /
        libpng12-dev /
        libjpeg-dev /
        libpng-dev
    && docker-php-ext-install iconv mcrypt /
    && docker-php-ext-configure gd /
        --enable-gd-native-ttf /
        --with-freetype-dir=/usr/include/freetype2 /
        --with-png-dir=/usr/include /
        --with-jpeg-dir=/usr/include /
    && docker-php-ext-install gd /
    && docker-php-ext-install mbstring /
    && docker-php-ext-enable gd

Si desea agregar el módulo FreeType en un contenedor existente:

# on docker host machine
docker exec -it $FPM_CONTAINER bash

>>>>

# inside the container
apt-get install -y /
        libfreetype6-dev /
        libmcrypt-dev /
        libpng12-dev /
        libjpeg-dev /
        libpng-dev
docker-php-ext-configure gd /
        --enable-gd-native-ttf /
        --with-freetype-dir=/usr/include/freetype2 /
        --with-png-dir=/usr/include /
        --with-jpeg-dir=/usr/include /
    && docker-php-ext-install gd

exit

<<<<

docker restart $FPM_CONTAINER

Answer 3

Solo recompile la extensión gd.so, en la carpeta php/ext/gd

./configure --with-php-config=/usr/local/php5/bin/php-config --with-freetype-dir=/usr/ --enable-gd-native-ttf