Since the data inside the single-quoted string is not parsed for variable substitution, it’s always a better idea speed-wise to initialize a string with single quotes, unless you specifically need variable substitution

Sachin

• Jun 21st, 2014

Single quotes will print the statement as a literal but double quotes prints the value for the variables also.....

mart0

• Feb 5th, 2014

Single quotes for performance, no matter if there are variables or not!

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abc

• Sep 12th, 2011

$message is a variable
$$message is Variable to Variable.

trivinfosys

 Profile Answers by trivinfosys Questions by trivinfosys

• Dec 16th, 2008

$$message  - this is called as variables variablesee...$message = "Welcome";$$message = "World";Now we can echo above strings likeecho $message.$welcome;This weill print we "WelcomeWorld"Note : variable's value can be act as variable

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abc

• Sep 12th, 2011

For this we can use the session objec($_SESSION)t. When the user login with his/ her user name and password, usually we check those to ensure for correctness. If that user name and password are valid ...

ashish.gijare

 Profile Answers by ashish.gijare Questions by ashish.gijare

• Feb 18th, 2009

We can use session for that when user logged in with the help of session we can check weather he has logged or not.

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What is the use of ob_start() in PHP?

abc

• Sep 12th, 2011

It starts object buffering

bansal richa

 Profile Answers by bansal richa Questions by bansal richa

• Aug 23rd, 2011

This function will turn output buffering on. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer.

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Why do we put @ symbol before any variable?

sakshi

• Oct 22nd, 2017

It suppress the errors or warnings.
eg@file_get_contents(www.abc.com);
if www.abc.com is not accessible it will suppress the errors.

abc

• Sep 12th, 2011

To supress the error

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Will the trim() function strip the NULL bytes?

rubak

 Profile Answers by rubak Questions by rubak

• May 22nd, 2012

Yes

kevinly0130

 Profile Answers by kevinly0130 Questions by kevinly0130

• May 11th, 2012

By default, yes.

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Malik Adeel

• Nov 20th, 2011

You don't need AJAX to perform this action, it can be done without using AJAX by onChange() function.

Heinz Stapff

• Nov 20th, 2011

Try
divId.innerHTML=XMLhttp.responseText
if you want the whole form the whole form has to be posted and urlencoded etc. Just echo back the parts you acctually want with the values you want?

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abc

• Sep 12th, 2011

Post
get
session
cookies
querystring

rubin2008

 Profile Answers by rubin2008 Questions by rubin2008

• Aug 28th, 2011

We can pass data from one page to another page using get post methods. Also data stored in session will be accessible across all pages

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Read Best Answer

Editorial / Best Answer

bicu  

 Profile Answers by bicu Questions by bicu

• Member Since Sep-2005 | Feb 4th, 2006

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Difference between require() and require_once():  require() includes and evaluates a specific file, while require_once() does that only if it has not been included before (on the same page).
So, require_once() is recommended to use when you want to include a file where you have a lot of functions for example. This way you make sure you don't include the file more times and you will not get the "function re-declared" error.

Difference between require() and include() is that require() produces a FATAL ERROR if the file you want to include is not found, while include() only produces a WARNING.

There is also include_once() which is the same as include(), but the difference between them is the same as the difference between require() and require_once().

aditya dhanraj

• Apr 29th, 2015

Require_once():-using this function we can access the data of another page once i. e we can not access the same page multiple times.

require():-using this function we can access the data of another page at the desire page multiple times i.e we can access the contents of same page multiple times.

LAILA NISHI

• Feb 21st, 2015

Include() and require() dose same work.The difference is on error cheeking .Require () gives a fatal error when file cant load whereas include() gives a warning and continue to execute.

Improve Answer

archit attrey

• Dec 27th, 2017

when we use mysql_fetch_array so in this condition we should pass value through an index or in the associative array through name instead of index. mysql_fetch_row only for a particular row. and mysq...

SUBHASISH MANDAL

• Jun 29th, 2016

Sir, Actually mysqli_fetch_array() and row() in both cases I can use echo $rwo[0] or $row[name] to retrieve data from database, thats why I could not get exactly difference between these.

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If we have a button on a simple page and a user clicks on the button, then how we can come to know how many times the user has clicked on the button?

rubin2008

 Profile Answers by rubin2008 Questions by rubin2008

• May 16th, 2010

You can try following script for determing click count on button<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt...

ashishdmc4

 Profile Answers by ashishdmc4 Questions by ashishdmc4

• Feb 8th, 2010

<html><head><script type="text/javascript">var ctr=0;function countercall(){ ctr++;}function show(){ alert(ctr); }</script></head><body><div style=&quo...

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Is it possible to submit form without submit button in PHP?

Mayank Sanghvi

• Mar 21st, 2018

Yes, you can submit it using Java Script or Ajax.

archit attrey

• Dec 27th, 2017

Yes, it is possible using Ajax and jQuery when you use ajax in this condition you Don't need to take submit. You take a simple button than directly you could be accessed by jQuery and then through ajax you can send the request on another page where you will implement SQL insert query.

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elango

• Dec 10th, 2014

Code
span style="color: #0000ff;">"testing purpose");

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Jun 29th, 2014

We can use mysql_real_escape_string function.

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Which will execute faster POST or GET? Explain

Abinash Kumar

• Jun 20th, 2017

Both will execute faster its just that the difference in method. Post does not throws value or information in the address bar but get does.

charujain

• Sep 15th, 2015

GET method can send only 1024 bytes of information and POST method have no limit.

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abc

• Sep 12th, 2011

By using setcookies we can get count

amitverma

 Profile Answers by amitverma Questions by amitverma

• Feb 6th, 2009

USE this code (It can NOT be simpler than this) -$file = fopen("counter.txt", ’a+’);if ($file == false) { die ("Unable to open/create file");}if (filesize("co...

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abc

• Sep 12th, 2011

We can do like this , call javascript function to any button or link and in that function write code like

Code
span style="color: #0000ff;">'frm' method='post' action='test.php'>
 

bhavsarpr

 Profile Answers by bhavsarpr Questions by bhavsarpr

• Jun 9th, 2009

 A form in Javascript can be submitted using document.formname.submit(); Other functions like PHP's header("location :$url");  is transfering control from one pa...

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Can you submit a form without using submit button? If Yes, How?

aditya dhanraj

• Apr 29th, 2015

Yes,by using submit() function of java script

Arun

• Jan 29th, 2015

i know its a bit late to answer but the above answers may mislead freshers. Ram redirection is not form submit, to submit a form without submit button, we may use java script. eg: ;{geshibot languag...

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bibin

• Jan 12th, 2018

function reversestring($string) { $len = strlen($string); for($i = $len-1; $i>=0; $i--) { echo $string[$i]; } } $revstr = reversestring(COMPUTER);"php function reversest...

Ankit

• May 25th, 2017

Reverse String Program

Code
 $string = "ABCDE"

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Chari

• Dec 7th, 2017

Inheritances are 4type, 1) single Inheritance, 2) Multiple Inheritance, 3) Multi level Inheritance, 4) Hybrid Inheritance.
PHP will supoort only Single, Multi level, and Hybrid.
Multiple Inheritance is not supported by PHP

ketan mahajan

• May 4th, 2016

PHP does not support multiple inheritance.
It supports single, multilevel, hierarchical inheritance.
But now php achieve multiple inheritance using trait concept of php.

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Where does the session stored, either client side or server side?

PRASHANT PRAKASH WADIKAR

• Mar 8th, 2018

Session stored on server side

sagar

• Jan 6th, 2018

Session stored on server side and cookies stored on client side.
session start using session_start(); method and destroy using session_destroy(); method

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