PHP Type Casting

Php function to convert character to equivalent int

Solution 1: The following code is equivalent to your php code: Solution 2: First note that in c++ string type is very different from character type. The «cheapest» way to do this is through the UCS-2 character encoding, which maps 1:1 from bytes unto the Unicode code points: Caveats: the returned code is always 4 hexadecimal digits long (which you may or may not like) and UCS-2 does not support characters higher than the BMP, i.e. higher than code point FFFF.

UTF8 to equivalent number in php

What you’re looking for is the Unicode code point, i.e. the numeric identifier by which the character is known in the Unicode character table. The «cheapest» way to do this is through the UCS-2 character encoding, which maps 1:1 from bytes unto the Unicode code points:

echo bin2hex(iconv('UTF-8', 'UCS-2', 'あ')); // 3042 

Caveats: the returned code is always 4 hexadecimal digits long (which you may or may not like) and UCS-2 does not support characters higher than the BMP, i.e. higher than code point FFFF.

There is nothing magic about UTF-8 in PHP. When you read the file, you’ll get the byte values (and not parsed as characters). Iterate of the data you’ve read and use ord() to get the decimal value of the byte.

If you want to do this with UTF-8 code points, you can use either mb_substr or iconv_substr to extract each character before using ord() to print the value of each byte that makes up the character.

Update: To expand with a complete solution:

$utf8 = file_get_contents("utf8.test"); for ($i = 0; $i < mb_strlen($utf8, "utf-8"); $i++) < $char = mb_substr($utf8, $i, 1, "utf-8"); print($char); print("\n"); for ($j = 0; $j < strlen($char); $j++) < print(dechex(ord($char[$j]))); >print("\n\n"); > 

f 66 o 6f o 6f Æ c386 Ø c398 Å c385 ご e38194 ざ e38196 

Php: int() function equivalent for bigint type? (int() cuts strings to, Sounds like you are running php on a 32 bit system. PHP_INT_MAX will tell you what the largest integer can be. Numbers > PHP_INT_MAX will be

How to convert a string to ASCII value in PHP without ord()?

Unpacks from a binary string into an array according to the given format.

Use the format C* to return everything as what you’d get from ord() .

print_r(unpack("C*", "Hello world")); 

Array ( [1] => 72 [2] => 101 [3] => 108 [4] => 108 [5] => 111 [6] => 32 [7] => 119 [8] => 111 [9] => 114 [10] => 108 [11] => 100 ) 

You could iterate over each character in the string, find its offset into a dictionary string using say strpos , then add on a base number eg 65 if your dictionary started with » ABC .

You’d need to handle unfound characters, so maybe better to use a dictionary of » #ABC . then add a base of 64 , obviously you’d need to test for «#» as a special character then.

You could even test against multiple distionary strings for limited character sets » #A..Z «, » #a..z «, » #0..9 «

You get the idea, but without knowing why you want to limit yourself I can’t tell whther this is useful to you.

You could try the iconv native function:

string iconv ( string $in_charset , string $out_charset , string $str ) 

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Php How To Convert A Char To Number

Using number_format. Another way of converting a string to a number is by using the number_format function. It will return the formatted number, otherwise, will show you E_WARNING. Here is an example of using the number_format function:

$num = (int) "10"; $num = (double) "10.12"; // same as (float) "10.12"; $num = "10" + 1; $num = floor("10.1"); $num = intval("10"); $num = floatval("10.1"); 

How to convert a string into number in PHP?

There are many methods to convert string into number in PHP some of them are discussed below: Method 1: Using number_format () Function. The number_format () function is used to convert string into a number. It returns the formatted number on success otherwise it gives E_WARNING on failure.

1,000 1,000.31 1000 1000.314 1000.314 1000 1000.314 1000.314 1000.314 1000.414

How to Convert a String to a Number in PHP

To convert a PHP string to a number, we can also use the intval () or floatval () function. Below are a few examples of intval ()’s usage. intval () can also be used to convert strings from hexadecimal (base 16) and octal (base 8) number systems to …

Convert a String to a Number in PHP

Use intval () Function to Convert a String to a Number in PHP. The floatval () function converts a string to a float. The parameter that those functions accept is a string and the return value is an integer or a floating number respectively. The variable StringName holds the value of the string.

$variableName = (int)$stringName $variableName = (float)$stringName The variable 10 has converted to a number and its value is 10. The variable 8.1 has converted to a number and its value is 8.1. The variable has converted to a number and its value is 0. intval( $StringName ); The variable 53 has converted to a number and its value is 53. The variable 25.3 has converted to a number and its value is 25.3. The variable 2020Time has converted to a number and its value is 2020. The variable Time2020 has converted to a number and its value is 0. The variable 25.3Time has converted to a number and its value is 25.3. The variable Time25.3 has converted to a number and its value is 0. settype($variableName, "typeName"); The variable has converted to a number and its value is 45.

How to Convert a String to a Number in PHP?

In this lesson, we have explained how to convert the string into numbers. There are several methods in PHP to convert a string into numbers. In this lesson we have covered two methods, first one is typecasting and in the second method we have used the intval () and floatval () function. ← Check If String Contains. Strip Space from String →.

     "; echo $int, "
";      "; echo floatval($num); ?> 

How to convert HTML character NUMBERS to plain characters in PHP?

refers to the unicode value of that char. so you could use some regex like: /&# (\d+);/g. to grab the numbers, I don’t know PHP but im sure you can google how to turn a number into its unicode equivalent char. Then simply replace your regex match with the char. Edit: Actually it looks like you can use this: mb_convert_encoding (‘æ’, ‘UTF-8

&#NUMBER; /&#(\d+);/g mb_convert_encoding('æ', 'UTF-8', 'HTML-ENTITIES'); echo html_entity_decode('æ', ENT_COMPAT, 'UTF-8'); $string = preg_replace('~&#x([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $string); $string = preg_replace('~&#(9+);~e', 'chr("\\1")', $string); ', $string, '
'; echo '
', $list, '
'; function decode(array $list) < foreach ($list as $key=>$value) < return utf8_encode(chr($value)); >> ?>

Php: converting number to alphabet and vice versa

which given a number converts it into character and it works fine but then I also want a reverse function of this that given any output of this function, return the exact input that was put in to produce that output and I tried this:

function toAlpha($data) < $alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'); $alpha_flip = array_flip($alphabet); if($data elseif($data > 25) < $dividend = ($data + 1); $alpha = ''; $modulo; while ($dividend >0) < $modulo = ($dividend - 1) % 26; $alpha = $alphabet[$modulo] . $alpha; $dividend = floor((($dividend - $modulo) / 26)); >return $alpha; > > function toNum($data) < $alphabet = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'); $alpha_flip = array_flip($alphabet); if(strlen($data) == 1)< return (isset($alpha_flip[$data]) ? $alpha_flip[$data] : FALSE); >else if(strlen($data) > 1) < $num = 1; for($i = 0; $i < strlen($data); $i++)< if(($i + 1) < strlen($data))< $num *= (26 * ($alpha_flip[$data[$i]] + 1)); >else < $num += ($alpha_flip[$data[$i]] + 1); >> return ($num + 25); > > $alphabet = range('A', 'Z'); echo $alphabet[3]; // returns D echo array_search('D', $alphabet); // returns 3 function toNum($data) < $alphabet = array( 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' ); $alpha_flip = array_flip($alphabet); $return_value = -1; $length = strlen($data); for ($i = 0; $i < $length; $i++) < $return_value += ($alpha_flip[$data[$i]] + 1) * pow(26, ($length - $i - 1)); >return $return_value; > /** * Converts an integer into the alphabet base (A-Z). * * @param int $n This is the number to convert. * @return string The converted number. * @author Theriault * */ function num2alpha($n) < $r = ''; for ($i = 1; $n >= 0 && $i < 10; $i++) < $r = chr(0x41 + ($n % pow(26, $i) / pow(26, $i - 1))) . $r; $n -= pow(26, $i); >return $r; > /** * Converts an alphabetic string into an integer. * * @param int $n This is the number to convert. * @return string The converted number. * @author Theriault * */ function alpha2num($a) < $r = 0; $l = strlen($a); for ($i = 0; $i < $l; $i++) < $r += pow(26, $i) * (ord($a[$l - $i - 1]) - 0x40); >return $r - 1; > function toAlpha($num) < return chr(substr("000".($num+65),-3)); >$alpha[0] = 'Alphabet'; for ($i = 'a'; $i $alpha[26] = 'z'; $alpha[0] = 'Alphabet'; for ($i = 'a'; $i function lettersToNumber($letters)< $alphabet = range('A', 'Z'); $number = 0; foreach(str_split(strrev($letters)) as $key=>$char) < $number = $number + (array_search($char,$alphabet)+1)*pow(count($alphabet),$key); >return $number; > lettersToNumber("A"); //returns 1 lettersToNumber("E"); //returns 5 lettersToNumber("Z"); //returns 26 lettersToNumber("AB"); //returns 28 lettersToNumber("AP"); //returns 42 lettersToNumber("CE"); //returns 83 function number_to_alpha($num, $code) < $alphabets = array('', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'); $division = floor($num / 26); $remainder = $num % 26; if($remainder == 0) < $division = $division - 1; $code .= 'z'; >else $code .= $alphabets[$remainder]; if($division > 26) return number_to_alpha($division, $code); else $code .= $alphabets[$division]; return strrev($code); > function alpha_to_number($code) < $alphabets = array('', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'); $sumval = 0; $code = strtolower(trim($code)); $arr = str_split($code); $arr_length = count($arr); for($i = 0, $j = $arr_length-1; $i < $arr_length; $i++, $j--) < $arr_value = array_search($arr[$i], $alphabets); $sumval = $sumval + ($arr_value * pow(26, $j)); >return $sumval; > function toAlpha($number, $alphabet) < $count = count($alphabet); if ($number $alpha = ''; while ($number > 0) < $modulo = ($number - 1) % $count; $alpha = $alphabet[$modulo] . $alpha; $number = floor((($number - $modulo) / $count)); >return $alpha; > toAlpha(45,range('a','z')); // lower greek $range = ['α', 'β', 'γ', 'δ', 'ε', 'ζ', 'η', 'θ', 'ι', 'κ', 'λ', 'μ', 'ν', 'ξ', 'ο', 'π', 'ρ', 'σ', 'τ', 'υ', 'φ', 'χ', 'ψ', 'ω']; // upper greek $range = ['Α', 'Β', 'Γ', 'Δ', 'Ε', 'Ζ', 'Η', 'Θ', 'Ι', 'Κ', 'Λ', 'Μ', 'Ν', 'Ξ', 'Ο', 'Π', 'Ρ', 'Σ', 'Τ', 'Υ', 'Φ', 'Χ', 'Ψ', 'Ω']; // georgian $range = ['ჵ' => 10000, 'ჰ' => 9000, 'ჯ' => 8000, 'ჴ' => 7000, 'ხ' => 6000, 'ჭ' => 5000, 'წ' => 4000, 'ძ' => 3000, 'ც' => 2000, 'ჩ' => 1000, 'შ' => 900, 'ყ' => 800, 'ღ' => 700, 'ქ' => 600, 'ფ' => 500, 'ჳ' => 400, 'ტ' => 300, 'ს' => 200, 'რ' => 100, 'ჟ' => 90, 'პ' => 80, 'ო' => 70, 'ჲ' => 60, 'ნ' => 50, 'მ' => 40, 'ლ' => 30, 'კ' => 20, 'ი' => 10, 'თ' => 9, 'ჱ' => 8, 'ზ' => 7, 'ვ' => 6, 'ე' => 5, 'დ' => 4, 'გ' => 3, 'ბ' => 2, 'ა' => 1]; function toAlpha($n,$case = 'upper') < $alphabet = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'); $n = $n-1; Util::error_log('N'.$n); if($n elseif($n > 26) < $dividend = ($n); $alpha = ''; $modulo; while($dividend >0) < $modulo = ($dividend - 1) % 26; $alpha = $alphabet[$modulo].$alpha; $dividend = floor((($dividend - $modulo) / 26)); >> if($case=='lower') < $alpha = strtolower($alpha); >Util::error_log("**************".$alpha); return $alpha; > function toLetter(int $num) < return strtoupper(base_convert($num + 9), 10, 36); >function toNum($str) < $num = 0; for ($i = 0; $i < strlen($str); $i++) < $num += ord($str[$i]); $num *= 26; >return $num; > function toStr($num) < $str = ''; while ($num >0) < $str = chr($num % 26) . $str; $num = (int) ($num / 26); >return $str; >

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