PHP Captcha Tutorial

[gogolplex74]

I wanted to post this comment, but I got CAPTCHA again

[XeenWoozy]

Someone slap captcha creators

[Florian00007]

You type captcha wrong maybe ?You can try this site, it enter automatic captcha and u can use it with different tools captcha trader.com/users/refer/Manst3r­sp33d/ You can earn credits for free.

[driverhdf]

captchas are getting harder to read so that they do not get solved by automated methods. the only way to bypass captcha is to get it solved by humans. find out at jdownloadercaptchabypass.blogs­pot.com

[GhibliOriginals]

Please someone; kick the ass of the guy who invented captchas they're just FUCKING annoying to read -last time i had to repeat the submission SIX times, "putain de bordel de MEEEEEEERDE"

[WebMasterGadgets]

Look to my Videos. I've created a little bit better captcha! :)

[NoFatGamer]

Hello, reader. If you started reading this, don't stop or else. I hate people who post these kind of comments but.... Post this to 16 videos in 30 minutes and promise your self to never listen to these kind of comments or make one up. But this one is real.If you don't post this, a boy with no head or legs will show up in ur room at midnight kill you. Everyone will forget u. start posting. the timer will start as soon as yes I do hate these coments

[GhibliOriginals]

Thumbs up if you're BORED of the captchas youtube asks for the comments

Always have to renew it 3 or 4 times before i can read something

[howardreplogle]

useless

[s1d3k1ckRO]

fuck captcha miss the old good times

[rvtech2011]

*****

[davidfsae]

What happened with the forum tutorial? :'(

[Zaldar14]

Dont work , at the beggining of the torurial when it suposed to give us a small black rectangle, it give me this : �PNG  IHDRP4!�IDATX���

����� �j>
*ּ�IEND�B`�

[marioluigi1234567]

Is it just me, or is fucking CAPTCHA getting harder and harder to read?

[B1KMusic]

@marioluigi1234567 I don't get why they can't just use a picture that contains normal text, it's not like bots can read text in a picture, that's just ridiculous. If scripts could read text in a picture, then google images would actually find the images we look for XD Seriously, the fucked up squiggly letters are unnecessary and a waste of time, bots can't read pictures, that's why they use pictures, but to use hard-to-read gibberish words like CrAETeTRMAkk is just bullshit.

[B1KMusic]

@B1KMusic Captcha is also pointless because it can be cracked, the "valid" code can just be found with a bot and run several times, so it's truly a huge waste of everyone's time. There's even a video on how to do it (v=e46A-PUpDvk, for instance :P)

[kanojiask62]

thank...for giving such knowledge

[kanojiask62]

thanx...for giving such knowledge

[theblackside1000]

why don't you use mt_rand ?

[lifeg0eson666]

@theblackside1000 I have no preference between rand, srand and mt_rand. From my experience srand and rand are just slightly faster than mt_rand. The algorithm used for mt_rand is well over 10 years old and its speed is just slightly slower than the formers.

[Oneworld87]

@lifeg0eson666 I know this is a little OT, but how long did it take you to become proficient with PHP? A year, 2 years or more? For me -- I don't think I'm proficient with the language yet (have lacked solitary dedication to it) -- it took several months of stressful attempts to grasp concepts that I would never have otherwise understood (that includes looping, arrays and OOP) but which now appear to be permanently nested in my conscious mind. But despite this, learning the rest of PHP...

[Oneworld87]

@Oneworld87 feels a lot similar to learning new words from English -- that is, learning functions and concepts, although despite understanding them, they do slip my mind occasionally and I have to re-read them again (e.g. curl methods, it took a good few tries to memorize some of the basic methods of this object). I think the problem may have been the lack of dedication - finding interest in other subjects and concepts other than programming, thereby potentially impeding the rate at which...

[Oneworld87]

@Oneworld87 the language was learned. That, and the lack of practice - this may seem absolutely stupid, but I was also experimenting with potential ways to learn without practice, and had soaked some parts of PHP and JS.

Anyway -- and apologies for what appears to be an incoherent message -- how did you learn PHP? Did you learn through examples, the documentation or/and by practicing language features and functions? And have you learned language features without practice by reading the syntax?

[lifeg0eson666]

@Oneworld87 I learned PHP mostly by looking at other people's examples and seeing how those gave an expected outcome. I would always go back to look at the documentation for a lot of functions and eventually they just stuck to me. As for learning other language features, like OOP, I understood how everything worked through taking a course in Java, surprisingly. Having a skill in one language makes it very easy for you to learn and understand another language very quickly, it's just the syntax.

[Oneworld87]

@lifeg0eson666 Thanks for the reply, and I sincerely agree with the latter-most part of your message (albeit it would mean that one would be best to learn a language such as C initially). Did you ever read through the source code of public domain PHP software to understand the language? Sometimes, I'll attempt to read the source of PHPBB (albeit have often lost patience with it due to its great verbosity and tedious references to underlying dependencies) -- this helps a lot too.

[Oneworld87]

@Oneworld87 Anyway, another question... did you ever succumb to some form of distraction whilst learning the language? E.g. such as when learning a difficult concept, feature or method, did you take a break by engaging in other activity for a given length of time (perhaps 30 minutes, an hour or even a day)? If so, was it better to temporarily distract yourself from learning something that's consciously overwhelming and then returning to it shortly thereafter, or to constantly hack at the info...

[Oneworld87]

@Oneworld87 ...until it sank in? Thanks!

[sparkybigptalkshow]

The voice ones SUCK!!

[pricelessppp]

there are show very hard to do the code

[medwardw2]

i dont see how this either allows or prevents a user from leaving a comment (or continuing with whatever the captcha is guarding-registration, purchase, comment, etc)??? ...am i missing something? i love the tut itself but im not sure about the rest...? u obviously know what ur doing, could u brief me on this please? thanks.

[lifeg0eson666]

@medwardw2 CAPTCHA can stop somebody from creating a script to automatically spam comments or create new accounts. People will obviously be able to make accounts on their own by reading the CAPTCHA, but using a CAPTCHA makes it more difficult for a script to send the data.

[medwardw2]

@lifeg0eson666 thanks for the fast reply. i guess what im wondering is how would i apply this to my comments section? i want the user to be denied comment posts unless the captcha is right. do i have to use 'if' statements to make it do that, or will it do that automatically? thanks again for your time and fast response.

[lifeg0eson666]

@medwardw2 Yea, you'll have to check if what the user entered is equal to the value of the captcha.

[medwardw2]

@lifeg0eson666 yeah, i kinda figured it out after my last post. i will have to add it to the 'if' statement i already have that checks for the existence of 'name' and 'comment'...something like: if $name && $comment && $captcha value, then (some code) else (some code)...am i on the right track? i think ill get it once i start playing with it. thanks alot for the tutorial, its been a big help. i look forward to more of them, take care.

[lifeg0eson666]

@medwardw2 Exactly, just check if the submitted $captcha == $_SESSION of that captcha.

[medwardw2]

@lifeg0eson666 gotcha. will do. appreciate it.

[500millionamericans]

Chaos will rule.

[malkamichel]

You forgot to delete the $_SESSION, on the second page, so user can just refresh the page, and for example, if it's a comments page, send alot of comments with just refreshing (and send back all data)

[iMPRE7ed]

Awesome, man. Thanks for sharing that)))

[Ianxcala]

Nice tutorial, exactly what I was looking for! Cheers

[rolaca11]

that is great! I am on to make a forum system, but today I had two, or more spam messages, which i think could have been prevented with this code. I thank you very much!

And I would have a question amout spam, and prevention: If I think well, than a spam-bot don't have script engine. So, if i had a javascript code, which means that c=2+2, and if c=4, the message will be sent, but if not, then a spam-bot tried to send a message. Send me a message, if my opinion is good or bad.

[bluekrim]

Good day! i got problem..

it states that

Undefined index: submit in captcha.php

if (!$_POST['submit']){

its working properly but why is it undefined there..

[freddyfamous]

@bluekrim do you have "error_reporting(E_ALL)"? try this one:

if (!isset($_POST['submit'])) {

}

and make sure the submit button has the same name-value as you ask in the if-statement...

[bluekrim]

good day nice tutorial

[TheDeadLike]

How to refresh the image?

[lifeg0eson666]

@TheDeadLike You can use an onClick Javascript event that changes the source of the image.

[TheDeadLike]

@lifeg0eson666 Tho, what will I change the source to? I tried using sending a random string post to the captcha page, it only refreshes once, I gave up on that and tried having the captcha PHP with some random get data everytime I click the button "renew".Tho that was no use either, it only changes it 3 times then nothing.

[TheDeadLike]

@lifeg0eson666 OK, I got it now ^^

[LoveIlja]

Hello,

First I have to say " I love jour tutorials".

I use them to study PHP. But when am at 3:55 min. of jour tut. (where you gave an "hello") My block stays black. I checked the script several times but it is exactly the same as yours. I also coppied the fonttype to the same folder of the scritp.

Can you help me with a solution??

[FlentMan]

can i have the form.php because i need it and i need instructions about the command that will happen aften i put in the right captcha the code i want to put in when it is correct is:

require('concrete/dispatcher.p­hp');

which loads the concrete5 homepage

that's the only code i need to add after the correct captcha is entered.

and i need it to reload the page

[lifeg0eson666]

@FlentMan My website phpsquad.net has all the source files for this project.

[BugsVHumans]

Thanks a lot, no more spammers in my web form because of you. Subscription added!

[dashbyictfd]

I have been messing with font size and have it the way i want it apart from I would like to make it bold so if I wanted the String to be bold I would do what?

imagettftext($img, 18, 0, 10, 20, $black, "calibri.ttf", $string); // setting the font to be used

[lifeg0eson666]

@dashbyictfd for bold you gotta load a bold font

[dashbyictfd]

@lifeg0eson666 Ok thanks, thought you might just be able to do through xhtml, o well.

[dashbyictfd]

fullscreen in hd is still poor quality, not sayin its you but it doesnt help straining eyes cos then dont listen to what u saying.....like i say good tutorials though

[dashbyictfd]

Due to being unable to read all the text I have so may typos I think I have just invented a new language, have to download the source, try zoom in a little when you do these as they are very useful and you do good tutorials.

[lifeg0eson666]

@dashbyictfd View in widescreen lol, or go fullscreen

[dashbyictfd]

Talk about eye strain, You need to zoom in a bit when you post these, you do good tutorials just the focus side thats a problem.

[thatsfishing]

Hey is there a way that when information is submitted with the captcha that when the user goes back to the form it is still there? If someone is writing a lengthy comment I don't want it to be lost just because they stuff up on the captcha. At the moment when they get it wrong, they can click a button that takes you back to the form page but the information is all gone. I was thinking if the value of the box was = to a variable which changes to submitted info.

[lifeg0eson666]

You could just create like "form.php" and the value of each input box and textarea would just be the POST data, and include the form if anything was wrong.

[lildanyboi]

yeah, thanks, you really helped me

[TheMWGriffin]

Great job mate. You seriously know your stuff!

[willzurmacht]

can someone tell me

what is the use of ob_start()?

[lifeg0eson666]

it turns on output buffering.

[willzurmacht]

ok thanks mr. handsome! :D

[xkkpafi]

Doesnt work. All you get is a horizontal line for the image.

[mikesherps]

i got this problem too

[dashbyictfd]

@xkkpafi Even I got it to work your eye sight must be worse than mine, to many typos

[STRIKERSINDEPENDENT]

cool dude , and how can i link that to my "send" button in the contactformular ?

[german199denuevo]

Yo hohohohoho!

[mauwebstudio]

Well done, good job.

[lifeg0eson666]

thank you :D

[andrei25ni]

awesome tut, thanks

[rameexgfx]

thankx for share but what are you use software ...?

[nuthouseproductz]

phpdesigner 2008

[uui211]

nm go it to work with imagestring...

[uui211]

hey i have a mac and when i try to put a word on the captcha image, it's not showing up. is this because fonts have a different extension on macs?

[warlord90210]

Thanks man, good video.

[PHP4FUN]

Tanks you

Muito bom, gostei muito.

vlw =)

[Dastieb]

How can i open PHP?

[angelquirozc]

excelent!!!

[Netmancusco]

Thank M@n

[Netmancusco]

man please result captcha capture in text please source..

[lifeg0eson666]

The source is available.

[Netmancusco]

captura captcha in txt metod reader Captcha..

[ItisLBLA]

Great tutorial,,,, Good Job,,

[BMCVET]

Congratulations for the script

Tanks very mutch my friend!

[watzgoodinthe718]

good job

[zachattackpro]

how did you upload this in HD?

[lifeg0eson666]

I recorded it with a 1280x720 video capture resolution.

[zachattackpro]

One more question, is there anyway to actually save the captcha in a images folder whenever it generates?

[lifeg0eson666]

Look at imagecopyresampled

[SuppaSocca]

great tut man. altho I would have liked to see how you add the quote system to forum.

what's next?

[lifeg0eson666]

Thanks :) time will tell what's next.

[asander127]

Thanks for this! This is the last thing i need to solve my sercretscripts!

[lifeg0eson666]

No problem :D

[NGKILLER1221]

I love your tuts =]

I did this captcha by myself, before you create this tutorial, but thanks for the vid.

Do you wanna make a php or php&mysql gallery? :)

[lifeg0eson666]

Thank you ! I'll see what I can do ;)

[FRABAR2]

ur such a php beast

[lifeg0eson666]

ur just a beast :D

[boburmum1]

wow. thanks much marcus!

[lifeg0eson666]

No problem :)

[mikesherps]

Nice tutorial mate o/

Any news or the forum tutorial ?

[lifeg0eson666]

The forum is pretty much done, the rest anybody can add on to it pretty simple.

[mikesherps]

I have finished my forum but would have been nice to see what you added

[EkulProductions]

NICE, finally another tutorial! Thanks Marcus.

[lifeg0eson666]

No problem, you're welcome :)

[ErnieeeeT]

Wow Marcus, getting popular here.

[lifeg0eson666]

Ernie ur qt. :D thanks.

[zomgpro]

Thanks for this, very helpful :D

But would this be as good as CAPTCHA systems you see on mainstream sites, do they use the same principle as you used here?

Also can't keep up with your typing, hehe :P

[lifeg0eson666]

No problem :) You could still use this on maybe any website just as long you wouldn't think people would be creating mass accounts or whatever you plan on doing with it.

[dezkit]

Dear Lifeg0eson666,

Very nice PHP Tutorial. I love your style in PHP styling. I always love your voice. Thank you.

~dezkit AKA BIG BOB

[lifeg0eson666]

lul dezkit bless u

[n00ster]

Lol you sound loads older than usual

[KINGV3NOM]

is what we could do lolol

[Legit92nick]

what a nerdy voice lmao

[lifeg0eson666]

Just my tutorial voice.

[Legit92nick]

lol

[ZeforceTutorials]

your voice is different

[zerohtense]

tomatos

[zerohtense]

tom - atos