PHP Tutorial: String Operations

Showing posts with label String Operations. Show all posts

Saturday, July 11, 2015

String,Strings Function and Operation on String

String: String is a sequence of Characters.

Strings Functions:

1. strlen(); --Returns the length of the String.

Strlen() Function source code

Length of "Hello World!".

2. strpos(); --Return the position of Substring or Second string in First String else return false.

strpos() string position function

output of the function

3. strrev(); --Reverse the entered String.

Reverse the string strrev() source code

Output of original string along with revered string

4. str_word_count(); --Return the Worlds in String Space Separated.

str_word_count() return the output total number of word in string.

output of the above code.

5. str_replace(); --Function replace the first parameter,with second from third String.

Source Code of str_replace()

output of above code.

Saturday, June 27, 2015

Assignment 1 Question 3 (Server side and Client Side Scripting)

<?php
/**
* @author : Rajendra Kumar Yadav
* @filename : a1q3.php
* @date : 23:53:58 Sat 27- Jun - 2015 IST
* College Work: Assignment 1 Question 3
* College : ATSS College PHP Practical
*/
?>
<html Copyright (c) 2015 Copyright Rajendra Kumar Yadav All Rights Reserved. lang="en">
<head> <title> Assignment 1 Question 3 </title> </head>
<h3 class='test'> Assignment 1 Question 3 </h3>
<hr align=center color=red size=2px>
<body align=center bgcolor= antiquewhite>
<style media="screen">
.test {

font-weight: normal;
font-family: "Times new Roman";
align-items: center;
font-language-override: normal;
color: inherit;
}
</style>
<pre class="test">
<form method="post" action="<?php $_PHP_SELF ?>">
<label for="str1">Enter String 1 </label> <input type="text" name="str1" required autofocus value="<?php if(isset($_POST['str1'])) echo $_POST['str1']; ?>"/><br/>
<label for="str2">Enter String 2 </label> <input type="text" name="str2" required autofocus value="<?php if(isset($_POST['str2'])) echo $_POST['str2']; ?>"/><br/>

<h3 class='test'> --:Select Your Choice:-- </h3>
<hr color=red size=0.5px align=center>
Append Strings <input type="radio" value="append" name="ch"/>
Size of length of String 1 <input type="radio" value="string1len" name="ch"/>
Reverse First String <input type="radio" value="stringrev" name="ch"/>
<hr color=red size=0.5px align=center>
<input type="submit" value="Check"/> <input type="reset" value="Clear Areas"/>
</form>
</pre>
</body>
</html>

<?php
if($_SERVER['REQUEST_METHOD']=='POST')
{

$str1=$_POST['str1']; // GOLABL VARIBALE FROM THE HTML PART.
$str2=$_POST['str2']; // GOLABL VARIBALE FROM THE HTML PART.
$ch=@$_POST['ch']; // GOLABL VARIBALE FROM THE HTML PART.

if($ch=='append')
{
echo "<hr align=center color=red> Concated String is:-"." $str1" . "$str2";
}
if($ch=='string1len') {
echo "<hr align=center color=red> String length is :- ". strlen($str1);
}
if($ch=='stringrev') {
$temp=strrev($str1);
echo "<hr align=center color=red>First String Reverse & second as its is :- ". " $temp "." $str2";
}

}
?>

Images to Work on the page...

Concatenation of Two String

Main Form View

Reverse First String and Print Overall String

Length of First String

Assignment 1 Question 2 (Server Side Scripting Part using PHP).

<?php
/*
@autor Rajendra Kumar Yadav
@Check the Substring position
@Check First and last occurance Position
@ Replace Small Substring with some new substring.
*/

$n=$_POST['str1'];
$n1=$_POST['str2'];
$n2=$_POST['str3'];
$ch=$_POST['ch'];
function POSITION($n,$n1)
{
$c=strpos($n,$n1);
$c1=strrpos($n,$n1);
echo "The Substring 2 Occurs at position ".$c." and ".$c1;
}
function OCCUR_SUBSTR($n,$n1)
{
$c2=substr_count($n,$n1);
echo "The Substring ".$n1 ." occured ".$c2." times.";
}

if($ch=="first_last_pos")
{
POSITION($n,$n1);
}
if($ch=="occ_substring")
{
OCCUR_SUBSTR($n,$n1);
}
function REPLACER($n,$n1,$n2)
{
$c3=strlen($n1);
$c4=substr_replace($n,$n2,$c,$c3);
echo "First String is ".$n;
echo "Second String is ".$n1;
echo "New String is ".$n2;

}
if($ch=="replacer")
{
REPLACER($n,$n1,$n2);
}

?>

Assignment 1 Question 2 (HTML Form Part)

<?php
/**
*@author Rajendra Kumar Yadav
*@File a1q2.php (Assignment 1 Question 2).
* Other Page name is "a1q1_server_Script.php"
* which control the server script
*/
?>
<html lang="en">
<head> <title> Assignment 1 Question 2 </title> </head>
<h3 align="center"> Assignment 1 Question 2 </h3>
<hr color="lightblue" size=0.5px width=1024>
<body align=center bgcolor=lightgrey>
<pre>
<div id=main>
<form method="post" action="a1q1_server_Script.php">
Enter the First String <input type=text name=str1><br/>
Enter The Second String <input type=text name=str2><br/>
Enter The Third String <input type=text name=str3><br/>
<hr color="navy" width=800px size=0.5px align=center>
First and last Position <input type=radio name="ch" value="first_last_pos"/>
Occurance of substring <input type=radio name="ch" value="occ_substring"/>
Replace the Second with Third String <input type=radio name="ch" value="replacer"/>
<hr color="navy" width=800px size=0.5px align=center/>
<input type=submit value=Check> <input type=reset value=Clear>
</form>
</div>
</pre>
</body>
</html>

Friday, June 26, 2015

Assignment 1 Question 1

<?php

* @author Rajendra Kumar Yadav

* @date 23:55:40 26-Jun-2015 IST

* ATSS First PHP Program

* Filename a1q1.php

* Assignment 1 Question 1 for Semester III.

<head> <title> Assignment 1, Question 1! </title> </head>

<h3> Welcome to Assignment 1 and Question 1!</h3>

<?php

if($_SERVER['REQUEST_METHOD']=='POST')

{

$str=$_POST['str']; //Global variable

$ch=$_POST['ch']; //Global variable

function COU($str) //Function to check the vowel occurance

{

$cnt=0;

for($i=0;$i<strlen($str);$i++)

{

$copystr=$str;

$c=substr($copystr,$i,1); //main statement for this and logic are below...

if($c=='A' || $c=='a' || $c=='E' || $c=='e' || $c=='I' || $c=='i' || $c=='O' ||$c=='o' || $c=='U' || $c=='u')

{

$cnt++;

}

echo "<hr color=#785be0>";

echo "<center>Total Occurance of Vowel are <strong>".$cnt."</strong></center>";

}

if($ch=="count") //checking if radio is to count the vowel to call COU($str) with $str parameter

{

COU($str);

}

function EACH_OCCUR($str) //same other fucntion defination...

{

$acnt=$ecnt=$icnt=$ocnt=$ucnt=0;

for($i=0;$i<strlen($str)-1;$i++)

{

$strcpy=$str;

$c=substr($strcpy,$i,1); //statement under for loop to check each position of the string and below the logic are...

{

if($c=='A' || $c=='a')

$acnt++;

if($c=='E' || $c=='e')

$ecnt++;

if($c=='I' || $c=='i')

$icnt++;

if($c=='O' || $c=='o')

$ocnt++;

if($c=='U' || $c=='u')

$ucnt++;

}

} echo "<hr color=#785be0>"; //printing the occurance ...

echo "A occurs <strong>".$acnt."</strong> times.<br>";

echo "E occurs <strong>".$ecnt."</strong> times.<br>";

echo "I occurs <strong>".$icnt."</strong> times.<br>";

echo "O occurs <strong>".$ocnt."</strong> times.<br>";

echo "U occurs <strong>".$ucnt."</strong> times.<br>";

}

if($ch=="occ")

{

EACH_OCCUR($str); //if radio to count each vowel seprately soo call to EACH_OCCUR($str) with parameter $str.

}

function PAL($str) //for palindrom

{

$strcpy=strrev($str); //reverse the string and store in the $strcpy

echo "<hr color=#785be0>";

if($strcpy==$str)

print("Entered String is Palndorm");

else

print("Entered string is not a Palndrom");

}

if($ch=="pal")

{

PAL($str);

}

<label for="str">Enter The String</label> <input title="text" name="str" value="<?php if(isset($_POST['str'])) echo $_POST['str'];?>" required/><br/>

<label for="Choice"> Select your Choice </label><hr color="#201100" width="180px" align="center">

Count the number of Vowel <input type="radio" name="ch" value="count" required>

Occurence of Each Vowel <input type="radio" name="ch" value="occ">

To check that the String is Palindrom of not <input type="radio" name="ch" value="pal"><br/>

</form>

</center>

</body>

</html>