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Showing posts with label manual function. Show all posts

Saturday, September 5, 2015

function for min number from array - manually

<?php

function min_number($array){
$min_number = $array[0];
$length = count($array);
for($i = 0; $i < $length; $i++){
if($min_number > $array[$i]){
$min_number = $array[$i];
}
}
return $min_number;
}

manual reverse string function in php

<?php

function string_rev($string){
$new_string = "";
$length = strlen($string) - 0;
for($i = $length; $i <= 0; $i--){
$new_string .= $string[$i];
}
return $new_string;
}

manual string length function in php

<?php

function string_len($string){
$i = 0;
while(isset($string[$i])){
$i++ ;
}
return $i;
}

Wednesday, September 2, 2015

manual sqrt function using php

<?php

//for precision number
//number_format(45.234729492, 3) = 45.235;
//number_format(45.234729492, 2) = 45.23;
//number_format(405.234729492, 2) = 405.23;

function mySqrt($number){
$first_range = 1;
$last_range = $number;
$middle_point = 0;
$sq_middle_point = 0;
while(true){
$middle_point = number_format(($first_range+$last_range) / 2, 3);
$sq_middle_point = number_format($middle_point ** 2, 3);
if($sq_middle_point == $number){
break;
}
if($sq_middle_point > $number){
$last_range = $middle_point;
}else{
$first_range = $middle_point;
}

}
return $middle_point;
}

echo mySqrt(5);

Manual upper case function and lower case function and case_change function in php

<?php
//chr("ASCII value") will return a character
//ord('character') will return ASCII value of this respective character
//ord('a') = 97
//ord('z') = 123
//ord('A') = 65
//ord('Z') = 91
//chr("97") = a
//chr("123") = z
//chr("65") = A
//chr("91") = Z
function case_change($string){
if(ord($string) < 97){
$string = chr(ord($string) + 32);
}else{
$string = chr(ord($string) - 32);
}
return $string;
}

function upperCase($string){
$new_string = "";
$length = strlen($string);
for($i = 0; $i < $length; $i++){
if(ord($string[$i]) >= 97 && ord($string[$i]) <= 123){
$new_string .= chr(ord($string[$i]) - 32);
}else{
$new_string .= $string[$i];
}
}
return $new_string;
}

function lowerCase($string){
$new_string = "";
$length = strlen($string);
for($i = 0; $i < $length; $i++){
if(ord($string[$i]) >= 65 && ord($string[$i]) <= 91){
$new_string .= chr(ord($string[$i]) + 32);
}else{
$new_string .= $string[$i];
}
}
return $new_string;
}

if(isset($_POST['string'])){
$string = $_POST['string'];
$upperString = upperCase($string);
$lowerString = lowerCase($string);
}

?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<h1>Put sentence in input box</h1>
<form action="" method="post">
<input type="text" name="string" id="" class="form-control"><br>
<input type="submit" name="" id="" class="btn btn-lg btn-success">
</form>
<br>
Upper Case: <br>
<?php
if(isset($upperString)){
echo $upperString;
}

?>
<br>
Lower Case: <br>
<?php
if(isset($lowerString)){
echo $lowerString;
}

?>
</div>
</body>
</html>