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| Posted: 08 Nov 2006 23:12 | ||
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Posts: 69 Join Date: Nov 2006 |
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Arrays are a complex element of the language to grasp but unfortunately these things are not going to go away as they are extremely useful for doing many processes programmatically.
So lets jump in at the deep end with creating an array. Creating an array To initialize an array simply use the following code PHP Code: Code:
<? $arrayVar = array(); ?> This does nothing special, it just creates a new array named $arrayVar. Lets add some values to this array. PHP Code: Code:
<? $arrayVar = array('foo','bar','baz'); ?> The above code changes the empty array into a 3 part array with 3 variables: foo, bar and baz. You can now access these variables with their indexes 0,1 and 2 for example: PHP Code: Code:
<? $arrayVar = array('foo','bar','baz'); //creates the array print $arrayVar[0]; // this would print the word 'foo' to the screen print $arrayVar[1]; //this would print 'bar' to the screen ?> This is all very well but wouldn't it be easier to give the variables index labels that are easier to remember? Well PHP will allow us to do just that! PHP Code: Code:
<? $arrayVar = array('gazonk' => 'foo', 'bop' => 'bar', 'quux' => 'baz'); //creates the array with easier to remember index values print $arrayVar['gazonk']; // this would print the word 'foo' to the screen print $arrayVar['bop']; //this would print 'bar' to the screen //Note that you can still access the vars in the original way too print $arrayVar[0]; // this would print the word 'foo' to the screen print $arrayVar[1]; //this would print 'bar' to the screen ?> So far we have learned how to create new arrays but we still haven't found out how to add new elements to an array or delete arrays Creating Array Elements To create an array element it is simple. Just use the following code PHP Code: Code:
<? $arrayVar = array('gazonk' => 'foo', 'bop' => 'bar', 'quux' => 'baz'); //creates the array with easier to remember index values //now lets add an element to the array $arrayVar['bat'] = "zxc"; //note that this new array var has been assigned a numerical index too //we can also add an array element with only a numerical index by using the following $arrayVar[] = "gloop"; //this will assign the next available numerical value to 'gloop' ?> That is all you need to add an array variable to an array Deleting array elements To delete an array element all you need is it's index and you can remove it using the unset() function. For Example: PHP Code: Code:
<? $arrayVar = array('gazonk' => 'foo', 'bop' => 'bar', 'quux' => 'baz'); //creates the array with easier to remember index values print $arrayVar['gazonk']; //prints 'foo' to the screen //we don't need foo anymore so lets delete it unset($arrayVar['gazonk']); ?> Conclusion So what have we done? We have created an array, filled it with elements, created extra elements and deleted elements we no longer need. This knowledge should be sufficient to allow you a good insight into the world of arrays. __________________ my own tutorial website... i love it... yeah i really do. marry me ..
http://www.tutorials-expert.com |
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| Posted: 14 Nov 2006 22:27 | ||
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Administrator Currently Offline |
Posts: 157 Join Date: Oct 2006 |
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excellent tutorial!
will be adding this to my website 
don't worry, credit will be given to you! thanks! __________________  |
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| Posted: 15 Nov 2006 01:05 | ||
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Posts: 69 Join Date: Nov 2006 |
lol... no problem
 __________________ my own tutorial website... i love it... yeah i really do. marry me ..
http://www.tutorials-expert.com |
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| Posted: 26 Nov 2006 16:00 | ||
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Posts: 12 Join Date: Nov 2006 |
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Very nice tutorial haxan, really useful mate!! Lots of interesting facts, really cool
Great work! |
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| Posted: 27 Nov 2006 10:30 | ||
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Registered User Currently Offline |
Posts: 69 Join Date: Nov 2006 |
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hehehe... i hope you ppl make it in use..
arrays save some time if you have good control over them. __________________ my own tutorial website... i love it... yeah i really do. marry me ..
http://www.tutorials-expert.com |
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| Posted: 28 Nov 2006 16:39 | ||
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Posts: 28 Join Date: Nov 2006 |
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nice tut __________________  |
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| Posted: 29 Nov 2006 06:15 | ||
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Registered User Currently Offline |
Posts: 12 Join Date: Nov 2006 |
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i really dont know a thing about designing and coding.
is there a way to learn it while you try to build? |
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| Posted: 29 Nov 2006 15:10 | ||
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Registered User Currently Offline |
Posts: 28 Join Date: Nov 2006 |
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yeah...follow tuts for something you want to build __________________ |
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