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61 lines
2.2 KiB
PHP
61 lines
2.2 KiB
PHP
<?php
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/**
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* Display Value Captcha Example
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* 2012-04-18
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* @version 3.2RC2 (April 2012)
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*
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* This example shows how to use the "display_value" option in Securimage which
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* allows the application to define the code that will be displayed on the
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* captcha image.
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*
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* Note: This value is not stored in the session or database! The display_value
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* parameter would be used by a 3rd party application that uses Securimage only
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* to display captcha images, but generates and manages the codes independently.
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*
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*/
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// Set debugging
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error_reporting(E_ALL);
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ini_set('display_errors', 1);
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// Defines Securimage class
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require_once '../securimage.php';
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// Create an array of options to give to Securimage
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// This example sets the captcha text to the current time
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// In order to use the display_value, a captchaId must be supplied so a random one is created
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// Next we set turn off some unnecessary options and set properties of captcha
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// image_width makes the image wide enough to hold the time
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// no_session tells Securimage not to start or use a session to store codes
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// no_exit tells Securimage not to terminate after calling Securimage::show()
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// use_sqlite_db tells Securimage not to use SQLite
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// send_headers tells Securimage not to send HTTP headers for the image; by not
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// sending headers, you can capture the output and save it to file or serve it
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// to the browser
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$options = array('display_value' => date('h:i:s a'),
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'captchaId' => sha1(uniqid($_SERVER['REMOTE_ADDR'] . $_SERVER['REMOTE_PORT'])),
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'image_width' => 250,
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'no_session' => true,
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'no_exit' => true,
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'use_sqlite_db' => false,
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'send_headers' => false);
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// construct new Securimage object with the given options
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$img = new Securimage($options);
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// show the image using the supplied display_value
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// this demonstrates how to use output buffering to capture the output
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ob_start(); // start the output buffer
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$img->show(); // output the image so it is captured by the buffer
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$imgBinary = ob_get_contents(); // get contents of the buffer
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ob_end_clean(); // turn off buffering and clear the buffer
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header('Content-Type: image/png');
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header('Content-Length: ' . strlen($imgBinary));
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echo $imgBinary;
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