Class

<?php namespace App\Libs; class Iconv { function phpmake_ico() { return true; } function GDtoICOstr(&$gd_ico_array) { foreach ($gd_ico_array as $key => $gd_image) { $IcoWidths[$key] = ImageSX($gd_image); $IcoHeights[$key] = ImageSY($gd_image); $bpp[$key] = ImageIsTrueColor($gd_image) ? 32 : 24; $totalcolors[$key] = ImageColorsTotal($gd_image); $icXOR[$key] = ''; for ($y = $IcoHeights[$key] - 1; $y >= 0; $y--) { for ($x = 0; $x < $IcoWidths[$key]; $x++) { $argb = $this->gpc($gd_image, $x, $y); $a = round(255 * ((127 - $argb['alpha']) / 127)); $r = $argb['red']; $g = $argb['green']; $b = $argb['blue']; if ($bpp[$key] == 32) { $icXOR[$key] .= chr($b).chr($g).chr($r).chr($a); } elseif ($bpp[$key] == 24) { $icXOR[$key] .= chr($b).chr($g).chr($r); } if ($a < 128) { @$icANDmask[$key][$y] .= '1'; } else { @$icANDmask[$key][$y] .= '0'; } } while (strlen($icANDmask[$key][$y]) % 32) { $icANDmask[$key][$y] .= '0'; } } $icAND[$key] = ''; foreach ($icANDmask[$key] as $y => $scanlinemaskbits) { for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) { $icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT))); } } } foreach ($gd_ico_array as $key => $gd_image) { $biSizeImage = $IcoWidths[$key] * $IcoHeights[$key] * ($bpp[$key] / 8); $bfh[$key] = ''; $bfh[$key] .= "\x28\x00\x00\x00"; $bfh[$key] .= $this->le2s($IcoWidths[$key], 4); $bfh[$key] .= $this->le2s($IcoHeights[$key] * 2, 4); $bfh[$key] .= "\x01\x00"; $bfh[$key] .= chr($bpp[$key])."\x00"; $bfh[$key] .= "\x00\x00\x00\x00"; $bfh[$key] .= $this->le2s($biSizeImage, 4); $bfh[$key] .= "\x00\x00\x00\x00"; $bfh[$key] .= "\x00\x00\x00\x00"; $bfh[$key] .= "\x00\x00\x00\x00"; $bfh[$key] .= "\x00\x00\x00\x00"; } $icondata = "\x00\x00"; $icondata .= "\x01\x00"; $icondata .= $this->le2s(count($gd_ico_array), 2); $dwImageOffset = 6 + (count($gd_ico_array) * 16); foreach ($gd_ico_array as $key => $gd_image) { $icondata .= chr($IcoWidths[$key]); $icondata .= chr($IcoHeights[$key]); $icondata .= chr($totalcolors[$key]); $icondata .= "\x00"; $icondata .= "\x01\x00"; $icondata .= chr($bpp[$key])."\x00"; $dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]); $icondata .= $this->le2s($dwBytesInRes, 4); $icondata .= $this->le2s($dwImageOffset, 4); $dwImageOffset += strlen($bfh[$key]); $dwImageOffset += strlen($icXOR[$key]); $dwImageOffset += strlen($icAND[$key]); } foreach ($gd_ico_array as $key => $gd_image) { $icondata .= $bfh[$key]; $icondata .= $icXOR[$key]; $icondata .= $icAND[$key]; } return $icondata; } function le2s($number, $minbytes=1) { $intstring = ''; while ($number > 0) { $intstring = $intstring.chr($number & 255); $number >>= 8; } return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT); } function gpc(&$img, $x, $y) { if (!is_resource($img)) { return false; } return @ImageColorsForIndex($img, @ImageColorAt($img, $x, $y)); } } ?>

Controller

if ( $error['text'] == "" && isset($_FILES['upimage']['tmp_name']) && $_FILES['upimage']['tmp_name'] && is_uploaded_file($_FILES['upimage']['tmp_name'])) {
                if ($_FILES['upimage']['type'] > 210000) {
                    $error['text'] = "你上传的文件体积超过了限制 最大不能超过200k";
                } else {
                    $fileext = array("image/pjpeg", "image/gif", "image/x-png", "image/png", "image/jpeg", "image/jpg");
                    if (!in_array($_FILES['upimage']['type'], $fileext)) {
                        $error['text'] = "你上传的文件格式不正确 仅支持 jpg，gif，png";
                    }else {
                        if ($im = @imagecreatefrompng($_FILES['upimage']['tmp_name']) or $im = @imagecreatefromgif($_FILES['upimage']['tmp_name']) or $im = @imagecreatefromjpeg($_FILES['upimage']['tmp_name'])) {
                            $imginfo = @getimagesize($_FILES['upimage']['tmp_name']);
                            if (!is_array($imginfo)) {
                                $error['text'] = "图形格式错误！";
                            }else {
                                switch ($_POST['size']) {
                                    case 1;
                                        $resize_im = @imagecreatetruecolor(16, 16);
                                        $size = 16;
                                        break;
                                    case 2;
                                        $resize_im = @imagecreatetruecolor(32, 32);
                                        $size = 32;
                                        break;
                                    case 3;
                                        $resize_im = @imagecreatetruecolor(48, 48);
                                        $size = 48;
                                        break;
                                    case 4;
                                        $resize_im = @imagecreatetruecolor(64, 64);
                                        $size = 64;
                                        break;
                                    case 5;
                                        $resize_im = @imagecreatetruecolor(128, 128);
                                        $size = 128;
                                        break;
                                    default;
                                        $resize_im = @imagecreatetruecolor(64, 64);
                                        $size = 64;
                                        break;
                                }
                                imagecopyresampled($resize_im, $im, 0, 0, 0, 0, $size, $size, $imginfo[0], $imginfo[1]);

                                $icon = new Iconv();

                                $gd_image_array = array($resize_im);
                                $icon_data = $icon->GDtoICOstr($gd_image_array);
                                $filename = "temp/" . date("Ymdhis") . rand(1, 1000) . ".ico";
                                if (file_put_contents($filename, $icon_data)) {
//                            $output = "生成成功！请点右键->另存为 保存到本地<br><a href="/" mce_href="/""".$filename."/" target=/"_blank/">点击下载</a>";
//                                    echo $filename;
                                    //数据展示
                                    $icon_arr=[
                                        'class'=>'',
                                        'time'=>date("Y-m-d H:i:s"),
                                        'filename'=>$_FILES['upimage']['name'],
                                        'filepath'=>$filename,
                                        'size'=>$size
                                    ];
                                }
                            }
                        } else {
                                $error['text'] = "生成错误请重试";

                        }
                    }
                }
            }else{
                $error['text'] = "请选择图片!";
            }

展示效果

源码地址

ico在线转换工具已经集成到了开源项目 https://github.com/diandianxiyu/ApiTesting 中 ，在线demo地址稍后再放出

2016年新年快乐！