Converting Text to Image in PHP Formatted by Alignment
During one of my project works I came across a situation like changing the input of TINYMCE editor to image. Can you believe what can be the user’s requirement? :P Basically what the client needed was to change the text to image and text should be in American Typewriter Font with the option of showing text as image formatted by alignment. i.e Left Alignment, Center Alignment or Right Alignment in a white background image. Then I did some research, this is another way of saying I Googled a lot! lol. I came across two scripts, one which converted text to image and another a function to set alignment. So I thought that why not combine both the codes and publish for others, who may need it as well.
The compiled code
[source language=”php”]
im = @imagecreate($W, $H)
or die(“Cannot Initialize new GD image stream”);
$background_color = imagecolorallocate($this->im, $bgcolor[0], $bgcolor[1], $bgcolor[2]); //RGB color background.
$text_color = imagecolorallocate($this->im, $color[0], $color[1], $color[2]); //RGB color text.
$this->imagettftextbox($this->im, $fsize,0, $X,$Y, $text_color, $font, $text,800);
}
/**
* This function works to set alignment in image and write image.
*/
public function imagettftextbox(&$image, $size, $angle, $left, $top, $color, $font, $text, $max_width)
{
$text_lines = explode(“\n”, $text); // Supports manual line breaks!
$lines = array();
$line_widths = array();
$largest_line_height = 0;
foreach($text_lines as $block)
{
$current_line = ”; // Reset current line
$align=ALIGN_CENTER; // Setting Alignment
$words = explode(’ ‘, $block); // Split the text into an array of single words
$first_word = TRUE;
$last_width = 0;
for($i = 0; $i < count($words); $i++)
{
$item = $words[$i];
$dimensions = imagettfbbox($size, $angle, $font, $current_line . ($first_word ? '' : ' ') . $item);
$line_width = $dimensions[2] - $dimensions[0];
$line_height = $dimensions[1] - $dimensions[7];
if($line_height > $largest_line_height) $largest_line_height = $line_height;
if($line_width > $max_width && !$first_word)
{
$lines[] = $current_line;
$line_widths[] = $last_width ? $last_width : $line_width;
/*if($i == count($words))
{
continue;
}*/
$current_line = $item;
}
else
{
$current_line .= ($first_word ? ” : ’ ‘) . $item;
}
if($i == count($words) - 1)
{
$lines[] = $current_line;
$line_widths[] = $line_width;
}
$last_width = $line_width;
$first_word = FALSE;
}
if($current_line)
{
$current_line = $item;
}
}
$i = 0;
foreach($lines as $line)
{
if($align == ALIGN_CENTER)
{
$left_offset = ($max_width - $line_widths[$i]) / 2;
}
elseif($align == ALIGN_RIGHT)
{
$left_offset = ($max_width - $line_widths[$i]);
}
imagettftext($image, $size, $angle, $left + $left_offset, $top + $largest_line_height + ($largest_line_height * $i), $color, $font, $line);
$i++;
}
return $largest_line_height * count($lines);
}
/**
* @name showAsPng
*
* Function to show text as Png image.
*
*/
public function showAsPng(){
header(“Content-type: image/png”);
return imagepng($this->im);
}
}
?>
[/source]
Save this file as TextToImage.class.php.
And then use this code to call the classes instance.
[source language=”php”]
makeImageF(“Thank you ! Subesh Pokhrel \n subesh.com.np”,”KORONG.TTF”);
$_im->showAsPng();
?>
[/source]
Cheers!