[英]can I have multiline text with GD and PHP?
我正在嘗試使用 GD+PHP 輸出多行文本,但無法正常工作。 我的 php 知識非常基礎。 這是代碼,知道如何輸出 2 或 3 行文本嗎?
$theText = (isset($_GET['caption']))? stripslashes($_GET['caption']) :'';
imagettftext($baseImage, $textSize, $textAngle, $textXposition, $textYposition, $textColor, $fontName, $theText);
imagettftext($baseImage, $textSize, $textAngle, $textXposition, $textYposition, $textColor, $fontName, $theText);
imagettftext($baseImage, $textSize, $textAngle, $textXposition+(25), $textYposition, $textColor, $fontName, $theText);
imagettftext($baseImage, $textSize, $textAngle, $textXposition+(50), $textYposition, $textColor, $fontName, $theText);
您必須添加 x 像素才能將其向下移動到 X 位置。 請記住,您的整個圖像應該足夠高和足夠寬以適合文本。
API 不支持它。 這是“手動”執行此操作的代碼:
我有一個未知長度的字符串,但只能使用一定的寬度。 所以我想出了這個。 基本上它將句子拆分為字符。 如果它碰到一個空格,它會檢查這個詞是否可以添加到前一行,如果不能,它會開始一個新行。 對於剛剛被砍掉的超長單詞也有一個蹩腳的安全措施,以免脫離圖像。
在我實際將文本打印到圖像的階段,我檢查該行是否小於允許的最大字符數並添加前導 + 尾隨空格,以模擬 text-align: center。
# Split up the lines
$arrMessage = str_split(stripcslashes($strMessage));
$arrTemp = array();
$line = 0;
$word = array();
$arrTemp[$line] = array();
foreach($arrMessage as $char){
//if we hit a space, see if we should continue line, or make a new line
if($char == " ")
{
//calculate numbers of chars currently on line + number of chars in word
$numTotalChars = (int) count($word) + (int) count($arrTemp[$line]);
//if total > 14 chars on a line, create new line
if($numTotalChars > 14)
{
$line++;
$arrTemp[$line] = array();
}
$word[] = $char;
//push word-array onto line + empty word array
$arrTemp[$line] = array_merge($arrTemp[$line], $word);
$word = array();
}
else
{
//if word is too long for a line, split it
if( count($word) > 16)
{
$numTotalChars = (int) count($word) + (int) count($arrTemp[$line]);
if($numTotalChars > 16)
{
$line++;
$arrTemp[$line] = array();
}
$arrTemp[$line] = array_merge($arrTemp[$line], $word);
$word = array();
}
$word[] = $char;
}
}
不要忘記將最后一個單詞添加到一行中。 您還需要檢查它是否應該在新行上。
在圖像中添加線條:
//add some px to x and y for every new line
$pos_x = $font->position[0];
$pos_y = $font->position[1];
$numLineHeight = 20;
$addToX = 0;
if($font->angle > 5)
{
$addToX = 2;
}
else if($font->angle < 0)
{
$addToX = -2;
}
# ADD MESSAGE
foreach($arrTemp as $arrLine){
//leading/trailing whitespace (==center text)
$numCharsOnThisLine = count($arrLine);
$extraWhiteSpace = 14 - $numCharsOnThisLine;
$frontBackSpace = floor($extraWhiteSpace / 2);
for($i = 0; $i < $frontBackSpace; $i++){
array_unshift($arrLine, " ");
$arrLine[] = " ";
}
//make string from char array
$strLine = implode("", $arrLine);
imagettftext ($image, $font->size, $font->angle, $pos_x, $pos_y, $tlt, $font->family, $strLine);
$pos_x = $pos_x + $addToX;
$pos_y = $pos_y + $numLineHeight;
}
您可以每行重復一個 imagettftext; 只需將$theText
拆分為一個數組(分隔符是 NewLine)並循環數組中的每個元素,將$textYposition
增加行的高度(請參閱$textSize
,但實際上您會使用imageftbbox
獲得更好的imageftbbox
。閱讀頁面在 PHP 手冊中
我的兩分錢......(由於多行文本要求,在循環中添加文本)
<?php
error_reporting(E_ALL);
error_reporting(-1);
ini_set('error_reporting', E_ALL);
/*
construction of the tcp scan
I would prefer building a C C.G.I.
but let's experiment with php
(apache user rights over nmap resources)
no php ressources on google website,
noor ajax call (worker) other then 'self'
so
I will use a php trick into the <img> html tag.
(<img src="mysite.com/gdtrick.php">)
I'm wondering if I can do the same with, let's say,
gdtrick.cgi... that would be so cool.
*/
// size of the image to create
$x = 300;
$y = 300;
$displacement_y = 24;
//debug
//$zetext = "test";
$image = imagecreate($x,$y);
$white = imagecolorallocate($image, 255,255,255);
$black = imagecolorallocate($image, 0,0,0);
$zeipaddr = "";
$zetext = "";
function getUserIP() {
$ipaddress = '';
if (isset($_SERVER['HTTP_CLIENT_IP']))
$ipaddress = $_SERVER['HTTP_CLIENT_IP'];
else if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
$ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
else if(isset($_SERVER['HTTP_X_FORWARDED']))
$ipaddress = $_SERVER['HTTP_X_FORWARDED'];
else if(isset($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']))
$ipaddress = $_SERVER['HTTP_X_CLUSTER_CLIENT_IP'];
else if(isset($_SERVER['HTTP_FORWARDED_FOR']))
$ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
else if(isset($_SERVER['HTTP_FORWARDED']))
$ipaddress = $_SERVER['HTTP_FORWARDED'];
else if(isset($_SERVER['REMOTE_ADDR']))
$ipaddress = $_SERVER['REMOTE_ADDR'];
else
$ipaddress = 'UNKNOWN';
return $ipaddress;
}
$zeipaddr = getUserIP();
//for debug
//echo "IP: " .$zeipaddr."<br>\n";
//$zeipaddr = "192.168.1.18";
$ports = array(21, 22, 23, 80, 8080, 8081, 8082, 5900, 5901, 5902, 3306, 6000, 6001, 6002, 6003);
//$ports = array(80);
$text1 = imagettftext($image, 12, 0, 12, $displacement_y, $black, "/usr/share/fonts/truetype/freefont/FreeSans.ttf", "PHP SCAN ON DEMAND");
$displacement_y += 12;
foreach ($ports as $port)
{
$connection = @fsockopen($zeipadrr, $port, $errno, $errstr, 1);
if (is_resource($connection))
{
$zetext = $zeipadrr . ':' . $port . ' ' . '(' . getservbyport($port, 'tcp') . ') is open.' ;
$text1 = imagettftext($image, 10, 0, 6, $displacement_y, $black, "/usr/share/fonts/truetype/freefont/FreeSans.ttf", $zetext);
fclose($connection);
}
else
{
$zetext = $zeipaddr . ':' . $port . " not active." ;
$text1 = imagettftext($image, 10, 0, 6, $displacement_y, $black, "/usr/share/fonts/truetype/freefont/FreeSans.ttf", $zetext);
}
$displacement_y += 16;
}
$displacement_y += 12;
$text1 = imagettftext($image, 12, 0, 12, $displacement_y, $black, "/usr/share/fonts/truetype/freefont/FreeSans.ttf", "Port scanning done !!!");
header('Content-Type: image/jpeg');
imagejpeg($image);
?>
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