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extend/barcode/class/BCGcode11.barcode.php

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+<?php
+/**
+ *--------------------------------------------------------------------
+ *
+ * Sub-Class - Code 11
+ *
+ *--------------------------------------------------------------------
+ * Copyright (C) Jean-Sebastien Goupil
+ * http://www.barcodephp.com
+ */
+include_once('BCGParseException.php');
+include_once('BCGBarcode1D.php');
+
+class BCGcode11 extends BCGBarcode1D {
+    /**
+     * Constructor.
+     */
+    public function __construct() {
+        parent::__construct();
+
+        $this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-');
+        $this->code = array(    // 0 added to add an extra space
+            '000010',   /* 0 */
+            '100010',   /* 1 */
+            '010010',   /* 2 */
+            '110000',   /* 3 */
+            '001010',   /* 4 */
+            '101000',   /* 5 */
+            '011000',   /* 6 */
+            '000110',   /* 7 */
+            '100100',   /* 8 */
+            '100000',   /* 9 */
+            '001000'    /* - */
+        );
+    }
+
+    /**
+     * Draws the barcode.
+     *
+     * @param resource $im
+     */
+    public function draw($im) {
+        // Starting Code
+        $this->drawChar($im, '001100', true);
+
+        // Chars
+        $c = strlen($this->text);
+        for ($i = 0; $i < $c; $i++) {
+            $this->drawChar($im, $this->findCode($this->text[$i]), true);
+        }
+
+        // Checksum
+        $this->calculateChecksum();
+        $c = count($this->checksumValue);
+        for ($i = 0; $i < $c; $i++) {
+            $this->drawChar($im, $this->code[$this->checksumValue[$i]], true);
+        }
+
+        // Ending Code
+        $this->drawChar($im, '00110', true);
+        $this->drawText($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) {
+        $startlength = 8;
+
+        $textlength = 0;
+        $c = strlen($this->text);
+        for ($i = 0; $i < $c; $i++) {
+            $textlength += $this->getIndexLength($this->findIndex($this->text[$i]));
+        }
+
+        $checksumlength = 0;
+        $this->calculateChecksum();
+        $c = count($this->checksumValue);
+        for ($i = 0; $i < $c; $i++) {
+            $checksumlength += $this->getIndexLength($this->checksumValue[$i]);
+        }
+
+        $endlength = 7;
+
+        $w += $startlength + $textlength + $checksumlength + $endlength;
+        $h += $this->thickness;
+
+        return parent::getDimension($w, $h);
+    }
+
+    /**
+     * Validates the input.
+     */
+    protected function validate() {
+        $c = strlen($this->text);
+        if ($c === 0) {
+            throw new BCGParseException('code11', 'No data has been entered.');
+        }
+
+        // Checking if all chars are allowed
+        for ($i = 0; $i < $c; $i++) {
+            if (array_search($this->text[$i], $this->keys) === false) {
+                throw new BCGParseException('code11', 'The character \'' . $this->text[$i] . '\' is not allowed.');
+            }
+        }
+
+        parent::validate();
+    }
+
+    /**
+     * Overloaded method to calculate checksum.
+     */
+    protected function calculateChecksum() {
+        // Checksum
+        // First CheckSUM "C"
+        // The "C" checksum character is the modulo 11 remainder of the sum of the weighted
+        // value of the data characters. The weighting value starts at "1" for the right-most
+        // data character, 2 for the second to last, 3 for the third-to-last, and so on up to 20.
+        // After 10, the sequence wraps around back to 1.
+
+        // Second CheckSUM "K"
+        // Same as CheckSUM "C" but we count the CheckSum "C" at the end
+        // After 9, the sequence wraps around back to 1.
+        $sequence_multiplier = array(10, 9);
+        $temp_text = $this->text;
+        $this->checksumValue = array();
+        for ($z = 0; $z < 2; $z++) {
+            $c = strlen($temp_text);
+
+            // We don't display the K CheckSum if the original text had a length less than 10
+            if ($c <= 10 && $z === 1) {
+                break;
+            }
+
+            $checksum = 0;
+            for ($i = $c, $j = 0; $i > 0; $i--, $j++) {
+                $multiplier = $i % $sequence_multiplier[$z];
+                if ($multiplier === 0) {
+                    $multiplier = $sequence_multiplier[$z];
+                }
+
+                $checksum += $this->findIndex($temp_text[$j]) * $multiplier;
+            }
+
+            $this->checksumValue[$z] = $checksum % 11;
+            $temp_text .= $this->keys[$this->checksumValue[$z]];
+        }
+    }
+
+    /**
+     * Overloaded method to display the checksum.
+     */
+    protected function processChecksum() {
+        if ($this->checksumValue === false) { // Calculate the checksum only once
+            $this->calculateChecksum();
+        }
+
+        if ($this->checksumValue !== false) {
+            $ret = '';
+            $c = count($this->checksumValue);
+            for ($i = 0; $i < $c; $i++) {
+                $ret .= $this->keys[$this->checksumValue[$i]];
+            }
+
+            return $ret;
+        }
+
+        return false;
+    }
+
+    private function getIndexLength($index) {
+        $length = 0;
+        if ($index !== false) {
+            $length += 6;
+            $length += substr_count($this->code[$index], '1');
+        }
+
+        return $length;
+    }
+}
+?>