ASSIGNMENT NO. 4 : TO STUDY ARRAYS
Set A
1. Create your array of 30 high temperatures, approximating the weather for a spring month, then find the average high temp, the five warmest high temps and the five coolest high temps. Display the result on the browser.
Hint: a) Use array_slice b) the HTML character entity for the degree sign is & deg;.
Solution:-
<html>
<head>
<title>High temparature Array</title>
</head>
<h2>High temperature for spring month </h2>
<?php
$highTemps = array(68,70,72,58,60,79,82,73,75,77,73,58,63,79,78,68,72,73,80,79,68,72,75,77,73,78,82,85,89,83);
$count=count($highTemps);
$total=0;
foreach($highTemps as $h)
{
$total+=$h;
}
$avg = round($total/$count);
echo"<p> the average high temp for the month was $avg ° f.<p>\n";
rsort($highTemps);
$topTemps = array_slice($highTemps,0,5);
echo"<p>the warmest fire high temperature were;<br>\n";
foreach($topTemps as $t)
{
echo "$t °F<br>\n";
}
echo"<p>";
$lowTemps = array_slice($highTemps,-5,5);
echo "<p> the coolest fire high temp.were:<br>\n";
foreach($lowTemps as $l)
{
echo "$l °F<br> \n";
}
echo"<p>";
?>
</html>
2. Write a menu driven program to perform the following stack and queue related operations:[Hint: use Array_push(), Array_pop(), Array_shift(), Array_unshift() ]
a) Insert an element in stack
b) Delete an element from stack
c) Display the contents of stack
d) Insert an element in queue
e) Delete an element from queue
f) Display the contents of queue
Solution:-
html file!!!
<!DOCTYPE html>
<html>
<body>
<form name=f method=get action=http://192.168.100.252/sy31/a4sa2.php>
<center>
<table>
<tr><th colspan=2><h1>Choose Menu</h1></th></tr>
<tr><td>Ente an array:</td> <td><input type=text name =a1></td></tr><br>
<tr><td>Enter an element to be inserted:</td> <td><input type=text name =w></td></tr><br>
<tr><td><input type=radio name=op value=1></td> <td>a.Insert an element in stack.</td></tr><br>
<tr><td><input type=radio name=op value=2></td> <td>b.Delete an element from stack.</td></tr><br>
<tr><td><input type=radio name=op value=3></td> <td>c.Display the contents of stack.</td></tr><br>
<tr><td><input type=radio name=op value=4></td> <td>d.Insert an element in queue.</td></tr><br>
<tr><td><input type=radio name=op value=5></td> <td>d.Delete an element from queue.</td></tr><br>
<tr><td><input type=radio name=op value=6></td> <td>d.Display the contents of queue.</td></tr><br>
<tr><th colspan=2><input type=submit name=sb value=Submit></th></tr>
</table>
</center>
</body>
</html>
/*as4seta2.php*/
<?php
$w=explode(",",$_GET['a1']); //1,2,3,7,10
$a=$_GET['op'];
/*$b=array(1,2,3,4,5,6,7,8,9);*/
switch($a)
{
case 1:
print_r($w);
array_push($w,10);
echo"<br>";
echo"After insert an element in stack:<br>";
print_r($w);break;
case 2:
print_r($w);
array_pop($w);
echo"<br>";
echo"After delete an element from stack :<br>";
print_r($w);break;
case 3:
echo "Contents of stack.<br>";
print_r($w);break;
case 4:
print_r($w);
array_unshift($w,9);
echo"<br>";
echo"After insert an element in queue:<br>";
print_r($w);break;
case 5:
print_r($w);
array_shift($w);
echo"<br>";
echo"After delete an element in queue:<br>";
print_r($w);break;
case 6:
echo "Contents of queue<br>";
print_r($w);break;
}
?>
Set B
1. Write a PHP script that inserts a new item in an array at any position.
(hint : use array_splice())
Solution :-
<?php
$given=array('1','2','3','4','5');
echo "Given Array: <br>";
foreach($given as $x)
{
echo "$x";
}
$inserted ='@';
array_splice($given,3,0,$inserted);
echo "<br> After inserting '@' the array is :"."\n";
foreach($given as $x)
{
echo "$x";
}
echo "\n";
?>
<!--
O/P:
Given Array:
12345
After inserting '@' the array is : 123@45
-->
2. Define an array. Find the elements from the array that matches the given value using appropriate search function.
Solution:-
<!DOCTYPE html>
<html>
<body>
<form name=f method=get action=http://localhost/as4setb2.php>
<center>
<table>
<tr><th colspan=2><h1>Choose Menu</h1></th></tr>
<tr><td>Ente an array:</td> <td><input type=text name =w></td></tr><br>
<tr><th colspan=2><input type=submit name=sb value=Submit></th></tr>
</table>
</center>
</body>
</html>
/*as4setb2.php*/
<?php
$a=array('inaara rajwani',' bcs', 'ty');
print_r($a);
$w1=$_GET ['w'];
print_r($w1);
if(in_array($w1,$a))
{
echo "The given element is found in defined array ";
}
else
{
echo "The given element is not found in defined array ";
}
?>
Set C
1. Write a PHP script to sort the following associative array :
array("Sophia"=>"31","Jacob"=>"41","William"=>"39","Ramesh"=>"40") in
a) ascending order sort by value
b) ascending order sort by Key
c) descending order sorting by Value
d) descending order sorting by Key
Solution:-
/*as4setc1*/
<?php
$array=array("Sophia"=>"31","Jacob"=>"41","William"=>"39","Ramesh"=>"40");
echo "Associative array : Ascending order sort by value <br>";
asort($array);
foreach($array as $y=>$y_value)
{
echo "Age of ".$y." is : ".$y_value."<br>";
}
echo "Associative array : Ascending order sort by Key <br>";
ksort($array);
foreach($array as $y=>$y_value)
{
echo "Age of ".$y." is : ".$y_value."<br>";
}
echo "Associative array : Descending order sorting by Value<br>";
arsort($array);
foreach($array as $y=>$y_value)
{
echo "Age of ".$y." is : ".$y_value."<br>";
}
echo "Associative array : Descending order sorting by Key<br>";
krsort($array);
foreach($array as $y=>$y_value)
{
echo "Age of ".$y." is : ".$y_value."<br>";
}
?>
2. Write a menu driven program to perform the following operations on associative arrays:
a) Split an array into chunks
b) Sort the array by values without changing the keys.
c) Filter the odd elements from an array.
d) Merge the given arrays.
e) Find the intersection of two arrays.
f) Find the union of two arrays.
g) Find set difference of two arrays.
Solution:-
<html>
<title>Assign4_SETC_Q2</title>
<body>
<center>
<table>
<form name=f method=get action="http://localhost/as4setc2.php">
<tr><th colspan=2>Menu</th></tr>
<tr><td>1.Split array into chunks</td><td><input type=radio name=r value=1></td></tr>
<tr><td>2.Sort array by value without changing key</td><td><input type=radio name=r value=2></td></tr>
<tr><td>3.Filter odd elements</td><td><input type=radio name=r value=3></td></tr>
<tr><td>4.Merge given array</td><td><input type=radio name=r value=4></td></tr>
<tr><td>5.Find intersection</td><td><input type=radio name=r value=5></td></tr>
<tr><td>6.Find union</td><td><input type=radio name=r value=6></td></tr>
<tr><td>7.Find set difference</td><td><input type=radio name=r value=7></td></tr>
<tr><td>SUBMIT</td><td><input type=submit name=s value=go></td></tr>
<center>
</form>
</table>
</body>
</html>
/*as4setc2.php*/
<?php
$c=$_GET['r'];
$a=array('pen'=>15,'pencil'=>5,'rubber'=>3,'book'=>30);
$a1=array('ira'=>15,'nia'=>57,'ria'=>3,'alia'=>30);
//$a2=array(15,48,10,155,2,78);
switch($c)
{
case 1:
echo"<br>Array in chunks of two <br>";
print_r(array_chunk($a,2,true));
echo"<br><br>";
print_r(array_chunk($a1,2,true));
echo"<br><br>";
break;
case 2:
print_r($a);
asort($a);//array sort by values
echo"<br>Array in ascending order<br>";
print_r($a);
arsort($a);//reverse array sort by values
echo"<br>Array in desecending order<br>";
print_r($a);
break;
case 3:
function isodd($v)
{
return $v%2;
}
print_r($a);
echo "<br>";
echo"<br>Filter the odd elements from an array.<br>";
print_r(array_filter($a,'isodd'));
break;
case 4 :
echo "<br>1st array<br>";
print_r($a);
echo "<br>2nd array<br>";
print_r($a1);
echo "<br>Array Merge<br>";
print_r(array_merge($a,$a1));
break;
case 5:
echo "<br>1st array<br>";
print_r($a);
echo "<br>2nd array<br>";
print_r($a1);
echo "<br>Array Intersection<br>";
print_r(array_intersect($a,$a1));
break;
case 6:
echo "<br>1st array<br>";
print_r($a);
echo "<br>2nd array<br>";
print_r($a1);
echo "<br>Array Union<br>";
$union=array_merge($a,$a1);
print_r(array_unique($union));
break;
case 7:
echo "<br>1st array<br>";
print_r($a);
echo "<br>2nd array<br>";
print_r($a1);
echo "<br>Array Differnce<br>";
print_r(array_diff($a,$a1));
break;
}
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