Very Simple way to find a given string is Palindrome or NOT.

Hi All,

Here  i have added the simple way to find a Palindrome using String Function.

<?php

// Palindrome using String function

$str = "1441";

$str1 = "12521";

$str2 = "MALAYALAM";

$str3 = "Game";

$strrev = strrev($str2);

if($str2 === $strrev){

echo $strrev ." is Palindrome"."</br>";

}else{

echo $str2. " Not a Palindrome"."</br>";

}

$strrev1 = strrev($str1);

if($str1 === $strrev1){

echo $strrev1 ." is Palindrome"."</br>";

}else{

echo $str1. " Not a Palindrome"."</br>";

}

$strrev2 = strrev($str);

if($str === $strrev2){

echo $strrev2 ." is Palindrome"."</br>";

}else{

echo $str. " Not a Palindrome"."</br>";

}

$strrev3 = strrev($str3);

if($str3 === $strrev3){

echo $strrev3." is Palindrome"."</br>";

}else{

echo $str3. " Not a Palindrome"."</br>";

}

?>

OUTPUT:

MALAYALAM is Palindrome

12521 is Palindrome

1441 is Palindrome

Game Not a Palindrome

PHP String Functions

STRING FUNCTIONS

Hi All,

I have added few important string functions. I hope it help you to understand and remember the string functions in PHP.

<?php

$str = "Welcome to Techie Snacks";

$str1 = "here you can find all the technical solutions across the platform";

$str2 = "\t\t New Era begins\t\t";

$email = "xxxx@gmail.com";

/*

  strtoupper

All characters of the String have Converted into UPPERCASE

Syntax: strtoupper($string);

*/

$upper = strtoupper($str);

echo $upper."</br>";

/*

strtolower

All characters of the String have Converted into LOWERCASE

Syntax: strtolower($string);

*/

$lower = strtolower($str);

echo $lower."</br>";

/*

ucfirst

First character of the word have Converted into UPPERCASE

Syntax: ucfirst($string);

*/

$ucupper = ucfirst($str1);

echo $ucupper."</br>";

/*

lcfirst

First character of the word have Converted into LOWERCASE

Syntax: lcfirst($string);

*/

$lcupper = lcfirst($str);

echo $lcupper."</br>";

/*

ucwords

First character of every word in UPPERCASE and all other characters remains unchanged.

Syntax: ucwords($string);

*/

$lcupper = ucwords($str1);

echo $lcupper."</br>";

/*

strlen

Returns and integer value representing the length of string.

It calculates the length of the string including all the whitespace and special characters.

Syntax: strlen($string)

*/

$strlength = strlen($str1);

echo $strlength."</br>";

/*

ltrim

Strip whitespace (or other characters) from the BEGINNING of a string

Syntax: string ltrim ( string $str [, string $character_mask ] );

*/

$ltrimmed = ltrim($str2,"\t");

echo $ltrimmed."</br>";

/*

trim

Strip whitespace (or other characters) from the BEGINNING and END of a string

Syntax: string trim ( string $str [, string $character_mask = " \t\n\r\0\x0B" ] );

*/

$trimmed = trim($str2, "e");

echo $trimmed."</br>";

/* strrev

Reverse a string

Syntax: strrev (string $string);

*/

$reverse = strrev($str);

echo $reverse."</br>";

/* strpos

Find the position of the first occurrence of a substring in a string

Syntax: int strpos ( string $haystack , mixed $needle [, int $offset = 0 ] );

*/

$find   = 'a';

$strpos = strpos($str, $find);

echo $strpos."</br>";

/* strstr

Find the first occurrence of a string

Syntax: string strstr ( string $haystack , mixed $needle [, bool $before_needle = FALSE ] );

*/

$domain_name = strstr($email, '@');

echo $domain_name."</br>";

/* stristr

Find the first occurrence of a string using insensitive

Syntax: string strstr ( string $haystack , mixed $needle [, bool $before_needle = FALSE ] );

*/

$domain_name = stristr($str1, 'H');

echo $domain_name."</br>";

?>

OUTPUT:

WELCOME TO TECHIE SNACKS

welcome to techie snacks

Here you can find all the technical solutions across the platform

welcome to Techie Snacks

Here You Can Find All The Technical Solutions Across The Platform

65

New Era begins

New Era begins

skcanS eihceT ot emocleW

20

@gmail.com

here you can find all the technical solutions across the platform

Object-Oriented Programming Concepts in PHP – Interface

Interface

Interfaces are defined in the same way as a class, but with the interface keyword replacing the class keyword and without any of the methods having their contents defined.

All methods declared in an interface must be public; this is the nature of an interface.

Interfaces allow you to create code which specifies which all methods a class must implement.

Note that it is possible to declare a constructor in an interface.

Implements

• To implement an interface, the implements operator is used.
• All methods in the interface must be implemented within a class; failure to do so will result in a fatal error.
• Classes may implement more than one interface if desired by separating each interface with a comma.
• Interfaces can be extended like classes using the extends operator.
• The class implementing the interface must use the exact same method signatures as are defined in the interface. Not doing so will result in a fatal error.

Example:

<?php

// Declare the interface 'myImplement'

interface myImplement

{

public function setVariable($name, $val);

public function getVariable($tempdata);

}

// Implement the interface

class temp implements myImplement

{

private $vars = array();

 // Implementing the SetVatiable  Method

public function setVariable($name, $val)

{

       $this->vars[$name] = $name;

       $this->vars[$val] = $val;

}

 // implementing the GetVariable Method

public function getVariable($tempdata)

   {

       foreach($this->vars as $name => $value) {

        $tempdata = str_replace('{' . $name . '}', $value, $tempdata);

    }

//return the result

    return $tempdata;

}

}

// Instance creation ( object)

$objTemp = new temp();

// set the values to setvariable method

$rest=$objTemp -> setVariable('bala','Welcome');

$rest=$objTemp -> setVariable('balaa','Welcome1');

$rest=$objTemp -> setVariable('bala1','Welcome2');

$rest=$objTemp -> setVariable('bala2','Welcome3');

// get the value from getvariable method

$objTemp -> getVariable($rest);

echo "<pre>";

print_r($objTemp);

?>

OUTPUT:

temp Object
(
   [vars:temp:private] => Array
       (
           [bala] => bala
           [Welcome] => Welcome
           [balaa] => balaa
           [Welcome1] => Welcome1
           [bala1] => bala1
           [Welcome2] => Welcome2
           [bala2] => bala2
           [Welcome3] => Welcome3
       )

)