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composer.json

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+{
+    "name": "eskandari/persianrender",
+    "type": "library",
+    "description": "PersianRender,Free persian letter conertor for using in php GD, etc.",
+    "keywords": ["text","image","gd","render","persian","persianletter"],
+    "homepage": "http://webafrooz.com",
+    "license": "GNU",
+    "authors": [
+        {
+            "name": "Mahmoud Eskandari",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "PersianRender\\": "lib/"
+        }
+    }
+}

lib/PersianRender.php

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+<?php
+
+namespace PersianRender;
+/**
+ * The GNU License (GNU v 3.0)
+ *
+ * Coyright Under GNU 2.0 License.
+ * Copyright 2017 Webafrooz.com.
+ * @package    PersianRender
+ * @author     Mahmoud Eskandari <[email protected]>
+ * @copyright  20017 mahmoud eskandari
+ * @link       https://github.com/mahmoud-eskandari/PersianRender
+ * @see        PersianRender
+ * @version    0.1
+ */
+
+class PersianRender
+{
+    /**
+     * Charachter List
+     * @var array
+     */
+    private static $N_LIST = [
+        'آ' => ['ﺂ', 'ﺂ', ''],
+        'ا' => ['ﺎ', '', ''],
+        'ب' => ['ﺐ', 'ﺒ', 'ﺑ'],
+        'پ' => ['ﭗ', 'ﭙ', 'ﭘ'],
+        'ت' => ['ﺖ', 'ﺘ', 'ﺗ'],
+        'ث' => ['ﺚ', 'ﺜ', 'ﺛ'],
+        'ج' => ['ﺞ', 'ﺠ', 'ﺟ'],
+        'چ' => ['ﭻ', 'ﭽ', 'ﭼ'],
+        'ح' => ['ﺢ', 'ﺤ', 'ﺣ'],
+        'خ' => ['ﺦ', 'ﺨ', 'ﺧ'],
+        'د' => ['ﺪ', 'ﺪ', ''],
+        'ذ' => ['ﺬ', 'ﺬ', ''],
+        'ر' => ['ﺮ', 'ﺮ', ''],
+        'ز' => ['ﺰ', 'ﺰ', ''],
+        'ژ' => ['ﮋ', 'ﮋ', ''],
+        'س' => ['ﺲ', 'ﺴ', 'ﺳ'],
+        'ش' => ['ﺶ', 'ﺸ', 'ﺷ'],
+        'ص' => ['ﺺ', 'ﺼ', 'ﺻ'],
+        'ض' => ['ﺾ', 'ﻀ', 'ﺿ'],
+        'ط' => ['ﻂ', 'ﻄ', 'ﻃ'],
+        'ظ' => ['ﻆ', 'ﻈ', 'ﻇ'],
+        'ع' => ['ﻊ', 'ﻌ', 'ﻋ'],
+        'غ' => ['ﻎ', 'ﻐ', 'ﻏ'],
+        'ف' => ['ﻒ', 'ﻔ', 'ﻓ'],
+        'ق' => ['ﻖ', 'ﻘ', 'ﻗ'],
+        'ک' => ['ﻚ', 'ﻜ', 'ﻛ'],
+        'گ' => ['ﮓ', 'ﮕ', 'ﮔ'],
+        'ل' => ['ﻞ', 'ﻠ', 'ﻟ'],
+        'م' => ['ﻢ', 'ﻤ', 'ﻣ'],
+        'ن' => ['ﻦ', 'ﻨ', 'ﻧ'],
+        'و' => ['ﻮ', 'ﻮ', ''],
+        'ه' => ['ﻪ', 'ﻬ', 'ﻫ'],
+        'ی' => ['ﯽ', 'ﯿ', 'ﯾ'],
+        'ك' => ['ﻚ', 'ﻜ', 'ﻛ'],
+        'ي' => ['ﻲ', 'ﻴ', 'ﻳ'],
+        'أ' => ['ﺄ', 'ﺄ', 'ﺃ'],
+        'ؤ' => ['ﺆ', 'ﺆ', ''],
+        'إ' => ['ﺈ', 'ﺈ', 'ﺇ'],
+        'ئ' => ['ﺊ', 'ﺌ', 'ﺋ'],
+        'ة' => ['ﺔ', 'ﺘ', 'ﺗ']
+    ];
+
+    /**
+     * Render Persian Letter
+     * @param $str
+     * @param bool $reverse
+     * @return string
+     */
+    public static function render($str, $reverse = false)
+    {
+        //
+        $str = str_replace(['ي', "\0"], ['ی', ''], $str);
+        $str = self::numeric_replace($str);
+        $str = self::mb_str_split(trim($str));
+        $out = [];
+
+        $i = 0;
+        while(isset($str[$i])) {
+            $l = $i - 1;
+            if(isset($str[$l])) {
+                $l = $str[$l];
+            } else {
+                $l = false;
+            }
+            $r = $i + 1;
+            if(isset($str[$r])) {
+                $r = $str[$r];
+            } else {
+                $r = false;
+            }
+            $out[] = self::howChar($l, $str[$i], $r);
+            $i++;
+        }
+
+        if($reverse) {
+            $out = array_reverse($out);
+        }
+
+        return implode('', $out);
+    }
+
+    /**
+     * Replace Numeric Letters
+     * @param $val
+     * @param bool $persian_to_latin
+     * @return mixed
+     */
+    public static function numeric_replace($val, $persian_to_latin = false)
+    {
+        $f = array('۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹', '۰');
+        $t = array('1', '2', '3', '4', '5', '6', '7', '8', '9', '0');
+
+        if($persian_to_latin) {
+            return str_replace($f, $t, $val);
+        }
+
+        return str_replace($t, $f, $val);
+    }
+
+    /**
+     * Find Charachter Mode (Middle OR END OR FIRST)
+     * @param $l
+     * @param $char
+     * @param $r
+     * @return bool|string
+     */
+    private static function howChar($l, $char, $r)
+    {
+        if(!isset(self::$N_LIST[$char])) {
+            return '';
+        }
+        $Result = 0;
+        if(
+            !empty($r) && array_key_exists($r, self::$N_LIST)
+            && !empty(self::$N_LIST[$char][2])
+            && !empty(self::$N_LIST[$r][0])
+        ) {
+            $Result += 4;
+        }
+        if(
+            !empty($l)
+            && array_key_exists($l, self::$N_LIST)
+            && !empty(self::$N_LIST[$char][0])
+            && !empty(self::$N_LIST[$l][2])
+        ) {
+            $Result += 2;
+        }
+        if($Result === 6) {
+            return self::$N_LIST[$char][1];
+        }
+        if($Result === 4) {
+            return self::$N_LIST[$char][2];
+        }
+        if($Result === 2) {
+            return self::$N_LIST[$char][0];
+        }
+        return $char;
+    }
+
+    /**
+     * Split String in utf-8
+     * @param $string
+     * @param int $string_length
+     * @return array
+     */
+	public static function mb_str_split($string, $string_length = 1)
+    {
+        if(mb_strlen($string) > $string_length || !$string_length) {
+            do {
+                $parts[] = mb_substr($string, 0, $string_length);
+                $string = mb_substr($string, $string_length);
+            } while(!empty($string));
+        } else {
+            $parts = array($string);
+        }
+        return $parts;
+    }
+
+}