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Generate captcha image from merge with separate letter images #120

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5e8fb62
Generate captcha image from merge with separate letter images
Sep 5, 2023
c0f920d
composer
pedrosoft May 5, 2025
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16 changes: 12 additions & 4 deletions composer.json
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Original file line number Diff line number Diff line change
@@ -1,19 +1,27 @@
{
"name": "gregwar/captcha",
"name": "malutanpetronel/captcha",
"type": "library",
"description": "Captcha generator",
"keywords": ["captcha", "spam", "bot"],
"keywords": ["captcha", "spam", "bot", "split", "multiple"],
"homepage": "https://github.com/Gregwar/Captcha",
"license": "MIT",
"authors": [
{
"name": "Grégoire Passault",
"email": "g.passault@gmail.com",
"homepage": "http://www.gregwar.com/"
"homepage": "http://www.gregwar.com/",
"role": "Developer"
},
{
"name": "Jeremy Livingston",
"email": "jeremy.j.livingston@gmail.com"
"email": "jeremy.j.livingston@gmail.com",
"role": "Developer"
},
{
"name": "Petronel Malutan",
"email": "malutanpetronel@gmail.com",
"homepage": "https://www.webnou.ro/",
"role": "Developer"
}
],
"require": {
Expand Down
134 changes: 75 additions & 59 deletions src/Gregwar/Captcha/CaptchaBuilder.php
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,11 @@ class CaptchaBuilder implements CaptchaBuilderInterface
*/
protected $contents = null;

/**
* @var array
*/
protected $contentLetters = [];

/**
* @var string
*/
Expand Down Expand Up @@ -406,85 +411,95 @@ public function buildAgainstOCR($width = 150, $height = 40, $font = null, $finge
*/
public function build($width = 150, $height = 40, $font = null, $fingerprint = null)
{
if (null !== $fingerprint) {
$this->fingerprint = $fingerprint;
$this->useFingerprint = true;
} else {
$this->fingerprint = array();
$this->useFingerprint = false;
}
$letters = strlen($this->phrase);
$width = $width/$letters;

if ($font === null) {
$font = __DIR__ . '/Font/captcha'.$this->rand(0, 5).'.ttf';
}

if (empty($this->backgroundImages)) {
// if background images list is not set, use a color fill as a background
$image = imagecreatetruecolor($width, $height);
if ($this->backgroundColor == null) {
$bg = imagecolorallocate($image, $this->rand(200, 255), $this->rand(200, 255), $this->rand(200, 255));
for ($i = 0; $i < $letters; $i++) {
if (null !== $fingerprint) {
$this->fingerprint = $fingerprint;
$this->useFingerprint = true;
} else {
$color = $this->backgroundColor;
$bg = imagecolorallocate($image, $color[0], $color[1], $color[2]);
$this->fingerprint = array();
$this->useFingerprint = false;
}
imagefill($image, 0, 0, $bg);
} else {
// use a random background image
$randomBackgroundImage = $this->backgroundImages[rand(0, count($this->backgroundImages)-1)];

$imageType = $this->validateBackgroundImage($randomBackgroundImage);
if ($font === null) {
$font = __DIR__ . '/Font/captcha'.$this->rand(0, 5).'.ttf';
}

$image = $this->createBackgroundImageFromType($randomBackgroundImage, $imageType);
}
if (empty($this->backgroundImages)) {
// if background images list is not set, use a color fill as a background
$image = imagecreatetruecolor($width, $height);
if ($this->backgroundColor == null) {
$bg = imagecolorallocate($image, $this->rand(200, 255), $this->rand(200, 255), $this->rand(200, 255));
} else {
$color = $this->backgroundColor;
$bg = imagecolorallocate($image, $color[0], $color[1], $color[2]);
}
imagefill($image, 0, 0, $bg);
} else {
// use a random background image
$randomBackgroundImage = $this->backgroundImages[rand(0, count($this->backgroundImages)-1)];

// Apply effects
if (!$this->ignoreAllEffects) {
$square = $width * $height;
$effects = $this->rand($square/3000, $square/2000);
$imageType = $this->validateBackgroundImage($randomBackgroundImage);

// set the maximum number of lines to draw in front of the text
if ($this->maxBehindLines != null && $this->maxBehindLines > 0) {
$effects = min($this->maxBehindLines, $effects);
$image = $this->createBackgroundImageFromType($randomBackgroundImage, $imageType);
}

if ($this->maxBehindLines !== 0) {
for ($e = 0; $e < $effects; $e++) {
$this->drawLine($image, $width, $height);
// Apply effects
if (!$this->ignoreAllEffects) {
$square = $width * $height;
$effects = $this->rand($square/3000, $square/2000);

// set the maximum number of lines to draw in front of the text
if ($this->maxBehindLines != null && $this->maxBehindLines > 0) {
$effects = min($this->maxBehindLines, $effects);
}

if ($this->maxBehindLines !== 0) {
for ($e = 0; $e < $effects; $e++) {
$this->drawLine($image, $width, $height);
}
}
}
}

// Write CAPTCHA text
$color = $this->writePhrase($image, $this->phrase, $font, $width, $height);
// Write CAPTCHA text
$color = $this->writePhrase($image, substr($this->phrase, $i,1), $font, $width, $height);

// Apply effects
if (!$this->ignoreAllEffects) {
$square = $width * $height;
$effects = $this->rand($square/3000, $square/2000);
// Apply effects
if (!$this->ignoreAllEffects) {
$square = $width * $height;
$effects = $this->rand($square/3000, $square/2000);

// set the maximum number of lines to draw in front of the text
if ($this->maxFrontLines != null && $this->maxFrontLines > 0) {
$effects = min($this->maxFrontLines, $effects);
}
// set the maximum number of lines to draw in front of the text
if ($this->maxFrontLines != null && $this->maxFrontLines > 0) {
$effects = min($this->maxFrontLines, $effects);
}

if ($this->maxFrontLines !== 0) {
for ($e = 0; $e < $effects; $e++) {
$this->drawLine($image, $width, $height, $color);
if ($this->maxFrontLines !== 0) {
for ($e = 0; $e < $effects; $e++) {
$this->drawLine($image, $width, $height, $color);
}
}
}
}

// Distort the image
if ($this->distortion && !$this->ignoreAllEffects) {
$image = $this->distort($image, $width, $height, $bg);
}
// Distort the image
if ($this->distortion && !$this->ignoreAllEffects) {
$image = $this->distort($image, $width, $height, $bg);
}

// Post effects
if (!$this->ignoreAllEffects) {
$this->postEffect($image);
}

$this->contentLetters[] = $image;

// Post effects
if (!$this->ignoreAllEffects) {
$this->postEffect($image);
}

$this->contents = $image;
//dd($this->contentLetters);
$this->contents = $this->contentLetters[0];
// dd($this);

return $this;
}
Expand Down Expand Up @@ -552,7 +567,8 @@ public function save($filename, $quality = 90)
*/
public function getGd()
{
return $this->contents;
// return $this->contents;
return $this->contentLetters;
}

/**
Expand Down