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extend/barcode/class/BCGpostnet.barcode.php

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+<?php
+/**
+ *--------------------------------------------------------------------
+ *
+ * Sub-Class - PostNet
+ *
+ * A postnet is composed of either 5, 9 or 11 digits used by US postal service.
+ *
+ *--------------------------------------------------------------------
+ * Copyright (C) Jean-Sebastien Goupil
+ * http://www.barcodephp.com
+ */
+include_once('BCGParseException.php');
+include_once('BCGBarcode1D.php');
+
+class BCGpostnet extends BCGBarcode1D {
+    /**
+     * Constructor.
+     */
+    public function __construct() {
+        parent::__construct();
+
+        $this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
+        $this->code = array(
+            '11000',    /* 0 */
+            '00011',    /* 1 */
+            '00101',    /* 2 */
+            '00110',    /* 3 */
+            '01001',    /* 4 */
+            '01010',    /* 5 */
+            '01100',    /* 6 */
+            '10001',    /* 7 */
+            '10010',    /* 8 */
+            '10100'     /* 9 */
+        );
+
+        $this->setThickness(9);
+    }
+
+    /**
+     * Draws the barcode.
+     *
+     * @param resource $im
+     */
+    public function draw($im) {
+        // Checksum
+        $checksum = 0;
+        $c = strlen($this->text);
+        for ($i = 0; $i < $c; $i++) {
+            $checksum += intval($this->text[$i]);
+        }
+
+        $checksum = 10 - ($checksum % 10);
+
+        // Starting Code
+        $this->drawChar($im, '1');
+
+        // Code
+        for ($i = 0; $i < $c; $i++) {
+            $this->drawChar($im, $this->findCode($this->text[$i]));
+        }
+
+        // Checksum
+        $this->drawChar($im, $this->findCode($checksum));
+
+        // Ending Code
+        $this->drawChar($im, '1');
+        $this->drawText($im, 0, 0, $this->positionX, $this->thickness);
+    }
+
+    /**
+     * Returns the maximal size of a barcode.
+     *
+     * @param int $w
+     * @param int $h
+     * @return int[]
+     */
+    public function getDimension($w, $h) {
+        $c = strlen($this->text);
+        $startlength = 3;
+        $textlength = $c * 5 * 3;
+        $checksumlength = 5 * 3;
+        $endlength = 3;
+
+        // We remove the white on the right
+        $removelength = -1.56;
+
+        $w += $startlength + $textlength + $checksumlength + $endlength + $removelength;
+        $h += $this->thickness;
+        return parent::getDimension($w, $h);
+    }
+
+    /**
+     * Validates the input.
+     */
+    protected function validate() {
+        $c = strlen($this->text);
+        if ($c === 0) {
+            throw new BCGParseException('postnet', 'No data has been entered.');
+        }
+
+        // Checking if all chars are allowed
+        for ($i = 0; $i < $c; $i++) {
+            if (array_search($this->text[$i], $this->keys) === false) {
+                throw new BCGParseException('postnet', 'The character \'' . $this->text[$i] . '\' is not allowed.');
+            }
+        }
+
+        // Must contain 5, 9 or 11 chars
+        if ($c !== 5 && $c !== 9 && $c !== 11) {
+            throw new BCGParseException('postnet', 'Must contain 5, 9, or 11 characters.');
+        }
+
+        parent::validate();
+    }
+
+    /**
+     * Overloaded method for drawing special barcode.
+     *
+     * @param resource $im
+     * @param string $code
+     * @param boolean $startBar
+     */
+    protected function drawChar($im, $code, $startBar = true) {
+        $c = strlen($code);
+        for ($i = 0; $i < $c; $i++) {
+            if ($code[$i] === '0') {
+                $posY = $this->thickness - ($this->thickness / 2.5);
+            } else {
+                $posY = 0;
+            }
+
+            $this->drawFilledRectangle($im, $this->positionX, $posY, $this->positionX + 0.44, $this->thickness - 1, BCGBarcode::COLOR_FG);
+            $this->positionX += 3;
+        }
+    }
+}
+?>