使用php将imagestring()居中?
我正在尝试为我的欢迎页面创建一个图像,并希望以友好的方式将字符串居中,否则使用不同的用户名就太糟糕了,比如:John和Alexandra使用php将imagestring()居中?,php,css,Php,Css,我正在尝试为我的欢迎页面创建一个图像,并希望以友好的方式将字符串居中,否则使用不同的用户名就太糟糕了,比如:John和Alexandra header("Content-type: image/png"); $string1 = "Hello!"; $string2 = "Welcome to our website!"; $srting3 = "$username"; $font1 = 5; $font2 = 3; $font3 = 3; $img_w = 240; $img_h
header("Content-type: image/png");
$string1 = "Hello!";
$string2 = "Welcome to our website!";
$srting3 = "$username";
$font1 = 5;
$font2 = 3;
$font3 = 3;
$img_w = 240;
$img_h = 64;
$image = imagecreatetruecolor ($img_w, $img_h);
$white = imagecolorallocate ($image, 255,255,255);
$black = imagecolorallocate ($image, 0, 0, 0);
imagefill($image, 0, 0, $white);
imagestring ($image, $font1, 110, 0, $string1, $black);
imagestring ($image, $font2, 60, 20, $string2, $black);
imagestring ($image, $font3, 105, 40, $string3, $black);
imagepng ($image);
imagedestroy($image);
试试这个:
<?php
$im = imagecreate(150,50);
$text = 'bobcat';
$bgd = imagecolorallocate($im, 180,180,180);
$mid = imagecolorallocate($im, 160,160,160);
$fw = imagefontwidth(5); // width of a character
$l = strlen($text); // number of characters
$tw = $l * $fw; // text width
$iw = imagesx($im); // image width
$xpos = ($iw - $tw)/2;
$ypos = 20;
imagestring ($im, 5, $xpos, $ypos, $text, $mid); // text in the middle
header("content-type: image/png");
imagepng($im);
imagedestroy($im);
?>
或者想想:
imagefontwidth()
函数获取每个字符的宽度,并将其与strlen($string)
相乘。您还可以使用imagefontheight()
更新高度
header("Content-type: image/png");
$string1 = "Hello!";
$string2 = "Welcome to our website!";
$srting3 = "$username";
$font1 = 5;
$width1 = imagefontwidth($font1) * strlen($string);
$height1 = imagefontheight($font1);
$font2 = 3;
$width2 = imagefontwidth($font2) * strlen($string2);
$height2 = imagefontheight($font2);
$font3 = 3;
$width3 = imagefontwidth($font3) * strlen($string3);
$height3 = imagefontheight($font3);
$img_w = 240;
$img_h = 64;
$image = imagecreatetruecolor ($img_w,$img_h);
$white = imagecolorallocate ($image,255,255,255);
$black = imagecolorallocate ($image,0,0,0);
imagefill($image,0,0,$white);
imagestring ($image,$font1,($img_w/2)-($width1/2), 0,$string1,$black);
imagestring ($image,$font2,($img_w/2)-($width2/2), $height1,$string2,$black);
imagestring ($image,$font3,($img_w/2)-($width3/2), $height1+$height2,$string3,$black);
imagepng ($image);
imagedestroy($image);