Protect PDF Document - PHP
PDF Password And Security sample in PHP demonstrating ‘Protect PDF Document’
protect-pdf.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Protect PDF Document Example</title>
</head>
<body>
<?php
// Note: If you have input files large than 200kb we highly recommend to check "async" mode example.
// Get submitted form data
$apiKey = $_POST["apiKey"]; // The authentication key (API Key). Get your own by registering at https://app.pdf.co
// 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
// * If you already have the direct PDF file link, go to the step 3.
// Create URL
$url = "https://api.pdf.co/v1/file/upload/get-presigned-url" .
"?name=" . urlencode($_FILES["file"]["name"]) .
"&contenttype=application/octet-stream";
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
// Get URL to use for the file upload
$uploadFileUrl = $json["presignedUrl"];
// Get URL of uploaded file to use with later API calls
$uploadedFileUrl = $json["url"];
// 2. UPLOAD THE FILE TO CLOUD.
$localFile = $_FILES["file"]["tmp_name"];
$fileHandle = fopen($localFile, "r");
curl_setopt($curl, CURLOPT_URL, $uploadFileUrl);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("content-type: application/octet-stream"));
curl_setopt($curl, CURLOPT_PUT, true);
curl_setopt($curl, CURLOPT_INFILE, $fileHandle);
curl_setopt($curl, CURLOPT_INFILESIZE, filesize($localFile));
// Execute request
curl_exec($curl);
fclose($fileHandle);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
// 3. PROTECT PDF FILE
ProtectPdf($apiKey, $uploadedFileUrl);
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
}
else
{
// Display service reported error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
curl_close($curl);
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
function ProtectPdf($apiKey, $uploadedFileUrl)
{
// Passwords to protect PDF document
// The owner password will be required for document modification.
// The user password only allows to view and print the document.
$OwnerPassword = "123456";
$UserPassword = "654321";
// Encryption algorithm.
// Valid values: "RC4_40bit", "RC4_128bit", "AES_128bit", "AES_256bit".
$EncryptionAlgorithm = "AES_128bit";
// Allow or prohibit content extraction for accessibility needs.
$AllowAccessibilitySupport = true;
// Allow or prohibit assembling the document.
$AllowAssemblyDocument = true;
// Allow or prohibit printing PDF document.
$AllowPrintDocument = true;
// Allow or prohibit filling of interactive form fields (including signature fields) in PDF document.
$AllowFillForms = true;
// Allow or prohibit modification of PDF document.
$AllowModifyDocument = true;
// Allow or prohibit copying content from PDF document.
$AllowContentExtraction = true;
// Allow or prohibit interacting with text annotations and forms in PDF document.
$AllowModifyAnnotations = true;
// Allowed printing quality.
// Valid values: "HighResolution", "LowResolution"
$PrintQuality = "HighResolution";
// Prepare URL for `PDF Security` API call
$url = "https://api.pdf.co/v1/pdf/security/add";
// Prepare requests params
$parameters = array();
$parameters["name"] = "result.pdf";
$parameters["url"] = $uploadedFileUrl;
$parameters["ownerPassword"] = $OwnerPassword;
$parameters["userPassword"] = $UserPassword;
$parameters["encryptionAlgorithm"] = $EncryptionAlgorithm;
$parameters["allowAccessibilitySupport"] = $AllowAccessibilitySupport;
$parameters["allowAssemblyDocument"] = $AllowAssemblyDocument;
$parameters["allowPrintDocument"] = $AllowPrintDocument;
$parameters["allowFillForms"] = $AllowFillForms;
$parameters["allowModifyDocument"] = $AllowModifyDocument;
$parameters["allowContentExtraction"] = $AllowContentExtraction;
$parameters["allowModifyAnnotations"] = $AllowModifyAnnotations;
$parameters["printQuality"] = $PrintQuality;
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
$resultFileUrl = $json["url"];
// Display link to the result file
echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>";
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
}
?>
</body>
</html>
sample.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Protect PDF Document Example</title>
</head>
<body>
<form name="form1" enctype="multipart/form-data" method="post" action="protect-pdf.php">
<p>
<label>Authentication key (API Key). Get your own by registering at <a href="https://apidocs.pdf.co">https://apidocs.pdf.co</a>.</label>
<br/>
<input type="text" name="apiKey" placeholder="API Key"/>
</p>
<p>
<label>Input File (*.pdf)</label>
<input type="hidden" name="MAX_FILE_SIZE" value="8000000"/>
<input type="file" name="file"/>
</p>
<input type="submit" name="submit" value="Proceed" />
</form>
</body>
</html>
PDF.co Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.