www.gusucode.com > 74cms PHP骑士人才系统 v3.5.1源码程序 > code/upload/include/template_lite/plugins/function.html_image.php
<?php /** * template_lite {html_image} function plugin * * Type: function * Name: html_image * Purpose: Outputs an image tag along with resized height/width * Input: * - url = the url of the picture * - width = optional width * - height = optional height * - limit = boolean - will resize image to the above height * and width if the above height and width are * smaller than the real height and width * - border = optional size of the border, default is "0" * - alt = optional alternate text to display * Examples:<br> * <pre> * {html_image url="http://www.yoursite.com/image.jpg"} * {html_image url="images/me.gif" alt="A picture of me!"} * </pre> * Author: Paul Lockaby <paul@paullockaby.com> */ function tpl_function_html_image($params, &$tpl) { require_once("shared.escape_chars.php"); $alt = ''; $url = ''; $height = ''; $width = ''; $extra = ''; $prefix = ''; $suffix = ''; $basedir = isset($_SERVER['DOCUMENT_ROOT']) ? $_SERVER['DOCUMENT_ROOT'] : ''; foreach($params as $_key => $_val) { switch($_key) { case 'url': case 'height': case 'width': $$_key = $_val; break; case 'limit': $$_key = true; break; case 'alt': if(!is_array($_val)) { $$_key = tpl_escape_chars($_val); } else { $tpl->trigger_error("html_image: attribute '$_key' cannot be an array"); } break; case 'link': case 'href': $prefix = '<a href="' . $_val . '">'; $suffix = '</a>'; break; default: if(!is_array($_val)) { $extra .= ' '.$_key.'="'.template_function_escape_special_chars($_val).'"'; } else { $template_object->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE); } break; } } if (empty($url)) { $template_object->trigger_error("html_image: missing 'url' parameter", E_USER_NOTICE); return; } if (substr($file,0,1) == '/') { $_image_path = $basedir . $file; } else { $_image_path = $file; } // 0 = width, 1 = height if ($size = @getimagesize($url)) { if (empty($limit) || $limit == false) { // only a height was specified; we will fill in the width if (!empty($height)) { $width = $size[0]; } // only a width was specified; we will fill in the height if (!empty($width)) { $height = $size[1]; } // neither a height nor a width was specified; we will fill in both if (empty($width) && empty($height)) { $width = $size[0]; $height = $size[1]; } } else { if ((!empty($width) && ($size[0] > $width)) || (!empty($height) && ($size[1] > $height))) { if (!empty($height) && !empty($width)) { // compare the ratios to determine how much each dimension needs to be changed // this will return the width if the height is set to specified $bth_width = round($size[0]*($height/$size[1])); // this will return the height if the width is set to specified $bth_height = round($size[1]*($width/$size[0])); // first we set the width to the max and see how big the height will be if (!($bth_height > $height)) { // returned height is acceptable (i.e. less than specified) $fin1_height = $bth_height; $fin1_width = $width; } // now we set the height to the max and see how big the width will be if (!($bth_width > $width)) { // returned width is acceptable (i.e. less than specified) $fin2_height = $height; $fin2_width = $bth_width; } // check to see if both of them went through if (isset($fin1_height) && isset($fin1_width) && isset($fin2_height) && isset($fin2_width)) { // now check the difference between abs($fin1_height-$fin1_width) and abs($fin2_height-$fin2_width) // since we obviously want the larger image, take whichever one has the smaller difference if (abs($fin1_height - $fin1_width) < abs($fin2_height - $fin2_width)) { $new_height = $fin1_height; $new_width = $fin1_width; } else { $new_height = $fin2_height; $new_width = $fin2_width; } } else { // since $new_height and $new_width weren't set above, we have to set them here if (isset($fin1_height) && isset($fin1_width)) { $new_height = $fin1_height; $new_width = $fin1_width; } else { $new_height = $fin2_height; $new_width = $fin2_width; } } } else { // only a height or only a width was specified // much easier if (!empty($height)) { // working with only a height now $new_height = $height; $new_width = round($size[0]*($height/$size[1])); } if (!empty($width)) { // working with only a width now $new_height = round($size[1]*($width/$size[0])); $new_width = $width; } } $width = $new_width; $height = $new_height; } else { $width = $size[0]; $height = $size[1]; } } } return $prefix . '<img src="' . $url . '" alt="' . $alt . '" width="' . $width . '" height="' . $height . '"'.$extra.' />' . $suffix; } ?>