Topic: best way to learn php/mysql?

[pneudralics]

Best way to learn is to just do it! The more you play with it the more you'll learn. I think I'm still a newbie but when I'm finished with a project I look back and sometimes wonder how the heck I did it.

[Daniel0]

Best way to learn is to just do it! The more you play with it the more you'll learn. I think I'm still a newbie but when I'm finished with a project I look back and sometimes wonder how the heck I did it.

I guarantee you, in half a year you'll think what you did sucks. If you don't something is wrong and you haven't learned anything in the mean time.

[pneudralics]

Best way to learn is to just do it! The more you play with it the more you'll learn. I think I'm still a newbie but when I'm finished with a project I look back and sometimes wonder how the heck I did it.

I guarantee you, in half a year you'll think what you did sucks. If you don't something is wrong and you haven't learned anything in the mean time.

I'm pretty sure in a half of year I'll probably think what I did sucks. I'm still learning. When I look at my codes I know what I did. I meant to say something more along the lines of I'm amazed I've come this far from just reading books and getting help here.

[jxrd]

Lol, Daniel0; your post about doing stuff just for the sake of it got me thinking...so I had a go at making an explode function like you suggested.



<?php

class explode

{

var $string, $buffer = array();

function __construct()

{

return true;

}

function explode($delimiter, $string)

{

$this->string = $string;

$string = array();

foreach($this->tokenise() as $key => $value)

{

if($value == $delimiter)

{

array_push($string, implode($this->buffer));

$this->buffer = array();

}

else

{

array_push($this->buffer, $value);

}

}

return array_merge($string, array(implode($this->buffer)));

}

function tokenise()

{

$array = array();

for($i = 0; $i < strlen($this->string); $i++)

{

array_push($array, substr($this->string, $i, 1));

}

return $array;

}

}

$explode = new explode;

$string = 'hello world :)';

print_r($explode->explode(' ', $string));
?>

[corbin]

Best way to learn is to just do it! The more you play with it the more you'll learn. I think I'm still a newbie but when I'm finished with a project I look back and sometimes wonder how the heck I did it.

I guarantee you, in half a year you'll think what you did sucks. If you don't something is wrong and you haven't learned anything in the mean time.

I'm pretty sure in a half of year I'll probably think what I did sucks. I'm still learning. When I look at my codes I know what I did. I meant to say something more along the lines of I'm amazed I've come this far from just reading books and getting help here.

I've been coding PHP for I think around 3 years now, and I still look back at things sometimes and I'm like "Wtf?!"





jxrd, I have a question...  Why did you wrap it in a class?



I'm procrastinating what I should be doing (x.x), so I decided to give it a go:


//array explode ( string $delimiter , string $string [, int $limit ] )
//I don't feel like implementing $limit
//Also, I would use better names than $d and $s if I were going to use this for real lol.
function splode($d, $s) {

$len = strlen($s);

$offset = 0;

$out = array();

//while(($place = strpos($s, $d, $offset)) !== false) {

while($offset < $len && ($place = strpos($s, $d, $offset)) !== false) {

$out[] = substr($s, $offset, $place-$offset);

$offset = $place+1;

}

//The place = blah !== false will not get the last match...

if($offset < $len) {

$out[] = substr($s, $offset, $len-$offset);

}

return $out;
}
print_r(explode(' ', 'This is a string with spaces!'));
print_r(splode(' ', 'This is a string with spaces!'));



When ever I first got into C++, I didn't know that the std::string class had a method designed for tokenizing a string, so I once recreating explode() in C++.  It was essentially the same as this haha.

[jxrd]

jxrd, I have a question...  Why did you wrap it in a class?

Idk, I needed to use two functions...thought it would be appropriate.

I guess I'm just not as resourceful as you

But...I bet you can't do strlen() !!!!!

<?php

function str_len($str)

{

$str = preg_split('/./', $str);

return count($str) - 1;

}

echo str_len('7 chars');
?>

[Daniel0]

Heh... you cheated and used built-in functions. Here you go with a with an explode() implementation that doesn't use any of PHP's built-in functions whatsoever.

function myStrlen($string)
{

for ($length = 0; isset($string[$length]); $length++) {}

return $length;
}

function myExplode($delimiter, $string, $limit = null)
{

$parts = array();

for ($i = 0, $j = 0, $length = myStrlen($string); $i < $length; $i++) {

if ($string[$i] == $delimiter && ($limit === null || $limit > $j+1)) {

$j++;

continue;

}

if (!isset($parts[$j])) {

$parts[$j] = $string[$i];

}

else {

$parts[$j] .= $string[$i];

}

}

return $parts;
}

[jxrd]

Oh, well, you didn't say we couldn't use built in functions...

Btw you used isset()!! Although, is that a language construct or a function..?

Suggest another; this is fun

[Daniel0]

isset() is a language construct, so I still win

Here you have a few others:
function myImplode($glue, array $pieces)
{

$string = '';

$maxIndex = myStrlen($pieces)-1; // myStrlen() will work for arrays because of the way it's written

foreach ($pieces as $i => $piece) {

$string .= $piece;

if ($i != $maxIndex) {

$string .= $glue;

}

}

return $string;
}

function myStrpos($haystack, $needle, $offset = 0)
{

for ($i = $offset, $length = myStrlen($haystack); $i < $length; $i++) {

if ($haystack[$i] == $needle) {

return $i;

}

}

return false;
}

function myStrrpos($haystack, $needle, $offset = 0)
{

for ($i = myStrlen($haystack) - 1 - $offset; $i >= 0; $i--) {

if ($haystack[$i] == $needle) {

return $i;

}

}

return false;
}

[jxrd]

Lol

How would you do foreach()?

I tried it in C++ the other day...didn't do too well. C++ arrays confuse me...with their vectors and stuff.

My initial thoughts would be var_export()...but obviously that's a built in function.

Appologies for off-topic-ness btw

[Daniel0]

Well, foreach is easy to do using a for loop, but only for enumerated arrays. foreach is a language construct too though, so you can't really implement it yourself.

The string and array functions should be possible without too much trouble though. You could try str_rot13(), str_replace(), trim() or perhaps ucwords().

[corbin]

Gah...  I'm a slow poster...  People have posted twice since this ;p.


isset is a language construct.


Hrmmm, I'm not sure how you could get around using isset though without causing PHP warnings though.






You tried to implement foreach() in C++?  Man, you live on the edge!  How would you have done that?  Make an array_walk type function?  Passing pointers to functions into functions would get murky quickly due to the strictness of function pointer passing in C++, although I guess you could use templating to make that easier maybe.

Or do you mean you actually tried to recreate the language construct foreach in C++?


I actually like the datatypes in C++.  I mean, when it comes down to coding speed, I code in PHP about 2938908923589234 times faster, but something about the rigidity and what not I like.

[jxrd]

<?php

function rot13_2($str)

{

$alpha = array(

'a',

'b',

'c',

'd',

'e',

'f',

'g',

'h',

'i',

'j',

'k',

'l',

'm',

'n',

'o',

'p',

'q',

'r',

's',

't',

'u',

'v',

'w',

'x',

'y',

'z'

);

$buffer = null;

for($i = 0; isset($str[$i]); $i++)

{

$alphanumeric = false;

$charcode = 0;

foreach($alpha as $key => $value)

{

if($value == $str[$i])

{

$alphanumeric = true;

$charcode = $key;

}

}

if($alphanumeric)

{

$charcode = ($charcode <= 13) ? $charcode + 13 : $charcode - 13;

$buffer .= $alpha[$charcode];

}

else

{

$buffer .= $str[$i];

}

}

return $buffer;

}

$str = rot13_2('hello');

echo $str.'<br />';

echo rot13_2($str);
?>

str_rot13 Proud of myself lol.

And yeah...numeric indexes would be easy for foreach. However...not if the indexes don't increment by 1

For example, array(0 => 'something', 5 => 'something else); would be pretty hard to do...

And yeah...I tried. And failed lol. Oh wait no, it was some sort of implode function. I can't find it now...I had another go though....
#include <iostream>

using namespace std;

string implode(string array)
{
    string buffer;

    int count = sizeof(array) / typeid(array[0]);

    for(int i = 0; i < count; i++)
    {
        buffer += array[i];
    }

    return buffer;
}

int main()
{
    char* array[3] = {"a", "b", "c"};

    cout << implode(array);

    return 0;
}

Does not work at all lol.