我的图像有自定义模型，应该可以找到正确的文件夹。然后让我通过在模型中执行此操作来调整图像大小。示例$this->model_tool_image->resize($this->settings->get('config_image'), 100, 100);
我知道codeigniter有一个但不是我所追求的。
由于某些原因，即使它们在那里也不会拍摄图像。我认为这可能是目录的问题？所有图像都保存在base_url() . 'images/catalog'中。发布的图像名称可以从DB中获得。
错误：无法加载图片！很奇怪我已经在模型上定义了路径并且它正在工作。
无图像显示
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Model_tool_image extends CI_Model {
public function __construct() {
parent::__construct();
$this->load->library('images');
define('DIR_IMAGE', base_url('image/catalog') .'/');
}
public function resize($filename, $width, $height) {
if (!is_file(DIR_IMAGE . $filename)) {
return;
}
$extension = pathinfo($filename, PATHINFO_EXTENSION);
$old_image = $filename;
$new_image = DIR_IMAGE . utf8_substr($filename, 0, utf8_strrpos($filename, '.')) . '-' . $width . 'x' . $height . '.' . $extension;
if (!is_file(DIR_IMAGE . $new_image) || (filectime(DIR_IMAGE . $old_image) > filectime(DIR_IMAGE . $new_image))) {
$path = '';
$directories = explode('/', dirname(str_replace('../', '', $new_image)));
foreach ($directories as $directory) {
$path = $path . '/' . $directory;
if (!is_dir(DIR_IMAGE . $path)) {
@mkdir(DIR_IMAGE . $path, 0777);
}
}
list($width_orig, $height_orig) = getimagesize(DIR_IMAGE . $old_image);
if ($width_orig != $width || $height_orig != $height) {
$image = new Image(DIR_IMAGE . $old_image);
$image->resize($width, $height);
$image->save(DIR_IMAGE . $new_image);
} else {
copy(DIR_IMAGE . $old_image, DIR_IMAGE . $new_image);
}
}
if ($this->input->server('HTTPS')) {
return HTTPS_SERVER . 'image/catalog/' . $new_image;
} else {
return HTTP_SERVER . 'image/catalog/' . $new_image;
}
}
}
控制器
$this->load->library('settings'); // Gets image from db OK example; nemo.png
$this->load->model('admin/tool/model_tool_image');
echo DIR_IMAGE;
if (!empty($this->input->post('config_image')) ) {
$data['config_image'] = $this->input->post('config_image');
} else {
$data['config_image'] = $this->settings->get('config_image');
}
if (!empty($this->input->post('config_image')) && is_file(DIR_IMAGE . $this->input->post('config_image'))) {
$data['thumb'] = $this->model_tool_image->resize($this->input->post('config_image'), 100, 100);
} elseif ($this->settings->get('config_image') && is_file(DIR_IMAGE . $this->settings->get('config_image'))) {
$data['thumb'] = $this->model_tool_image->resize($this->settings->get('config_image'), 100, 100);
} else {
$data['thumb'] = $this->model_tool_image->resize(base_url() . 'image/no_image.png', 100, 100);
}
$data['placeholder'] = $this->model_tool_image->resize(base_url() . 'image/no_image.png', 100, 100);
return $this->load->view('setting/settings', $data);
自定义图片库
<?php
class Images {
private $file;
private $image;
private $info;
public function __construct($file = '') {
if (file_exists($file)) {
$this->file = $file;
$info = getimagesize($file);
$this->info = array(
'width' => $info[0],
'height' => $info[1],
'bits' => isset($info['bits']) ? $info['bits'] : '',
'mime' => isset($info['mime']) ? $info['mime'] : ''
);
$this->image = $this->create($file);
} else {
exit('Error: Could not load image ' . $file . '!');
}
}
private function create($image) {
$mime = $this->info['mime'];
if ($mime == 'image/gif') {
return imagecreatefromgif ($image);
} elseif ($mime == 'image/png') {
return imagecreatefrompng($image);
} elseif ($mime == 'image/jpeg') {
return imagecreatefromjpeg($image);
}
}
public function save($file, $quality = 90) {
$info = pathinfo($file);
$extension = strtolower($info['extension']);
if (is_resource($this->image)) {
if ($extension == 'jpeg' || $extension == 'jpg') {
imagejpeg($this->image, $file, $quality);
} elseif ($extension == 'png') {
imagepng($this->image, $file);
} elseif ($extension == 'gif') {
imagegif ($this->image, $file);
}
imagedestroy($this->image);
}
}
public function resize($width = 0, $height = 0, $default = '') {
if (!$this->info['width'] || !$this->info['height']) {
return;
}
$xpos = 0;
$ypos = 0;
$scale = 1;
$scale_w = $width / $this->info['width'];
$scale_h = $height / $this->info['height'];
if ($default == 'w') {
$scale = $scale_w;
} elseif ($default == 'h') {
$scale = $scale_h;
} else {
$scale = min($scale_w, $scale_h);
}
if ($scale == 1 && $scale_h == $scale_w && $this->info['mime'] != 'image/png') {
return;
}
$new_width = (int)($this->info['width'] * $scale);
$new_height = (int)($this->info['height'] * $scale);
$xpos = (int)(($width - $new_width) / 2);
$ypos = (int)(($height - $new_height) / 2);
$image_old = $this->image;
$this->image = imagecreatetruecolor($width, $height);
if (isset($this->info['mime']) && $this->info['mime'] == 'image/png') {
imagealphablending($this->image, false);
imagesavealpha($this->image, true);
$background = imagecolorallocatealpha($this->image, 255, 255, 255, 127);
imagecolortransparent($this->image, $background);
} else {
$background = imagecolorallocate($this->image, 255, 255, 255);
}
imagefilledrectangle($this->image, 0, 0, $width, $height, $background);
imagecopyresampled($this->image, $image_old, $xpos, $ypos, 0, 0, $new_width, $new_height, $this->info['width'], $this->info['height']);
imagedestroy($image_old);
$this->info['width'] = $width;
$this->info['height'] = $height;
}
public function watermark($file, $position = 'bottomright') {
$watermark = $this->create($file);
$watermark_width = imagesx($watermark);
$watermark_height = imagesy($watermark);
switch($position) {
case 'topleft':
$watermark_pos_x = 0;
$watermark_pos_y = 0;
break;
case 'topright':
$watermark_pos_x = $this->info['width'] - $watermark_width;
$watermark_pos_y = 0;
break;
case 'bottomleft':
$watermark_pos_x = 0;
$watermark_pos_y = $this->info['height'] - $watermark_height;
break;
case 'bottomright':
$watermark_pos_x = $this->info['width'] - $watermark_width;
$watermark_pos_y = $this->info['height'] - $watermark_height;
break;
}
imagecopy($this->image, $watermark, $watermark_pos_x, $watermark_pos_y, 0, 0, 120, 40);
imagedestroy($watermark);
}
public function crop($top_x, $top_y, $bottom_x, $bottom_y) {
$image_old = $this->image;
$this->image = imagecreatetruecolor($bottom_x - $top_x, $bottom_y - $top_y);
imagecopy($this->image, $image_old, 0, 0, $top_x, $top_y, $this->info['width'], $this->info['height']);
imagedestroy($image_old);
$this->info['width'] = $bottom_x - $top_x;
$this->info['height'] = $bottom_y - $top_y;
}
public function rotate($degree, $color = 'FFFFFF') {
$rgb = $this->html2rgb($color);
$this->image = imagerotate($this->image, $degree, imagecolorallocate($this->image, $rgb[0], $rgb[1], $rgb[2]));
$this->info['width'] = imagesx($this->image);
$this->info['height'] = imagesy($this->image);
}
private function filter($filter) {
imagefilter($this->image, $filter);
}
private function text($text, $x = 0, $y = 0, $size = 5, $color = '000000') {
$rgb = $this->html2rgb($color);
imagestring($this->image, $size, $x, $y, $text, imagecolorallocate($this->image, $rgb[0], $rgb[1], $rgb[2]));
}
private function merge($file, $x = 0, $y = 0, $opacity = 100) {
$merge = $this->create($file);
$merge_width = imagesx($merge);
$merge_height = imagesy($merge);
imagecopymerge($this->image, $merge, $x, $y, 0, 0, $merge_width, $merge_height, $opacity);
}
private function html2rgb($color) {
if ($color[0] == '#') {
$color = substr($color, 1);
}
if (strlen($color) == 6) {
list($r, $g, $b) = array($color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5]);
} elseif (strlen($color) == 3) {
list($r, $g, $b) = array($color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2]);
} else {
return false;
}
$r = hexdec($r);
$g = hexdec($g);
$b = hexdec($b);
return array($r, $g, $b);
}
}
答案 0 :(得分：0)
在您的模型中以这种方式定义您的DIR_IMAGE
define('DIR_IMAGE', FCPATH.'image/catalog/');
答案 1 :(得分：0)
我不认为你会使用这样的定义。如果你在一个类中使用一个常量，你可以像这样定义它：
class MyClass
{
const MYCONSTANT = 'constant value';
function showConstant() {
echo self::MYCONSTANT. "\n";
}
}
如果您使用支持命名空间的php版本来查看：http://php.net/manual/en/function.define.php 它是命名空间定义的，而且我也不确定定义是否在类中工作...这通常是在过程代码中。