go line by line and loop?

Question

I am not good with php I'll be honest. I had a snippet of code from a while back that actually works now but it randomizes the text instead of doing line by line 1 at a time. I need it to be balanced when rotating. Here is what I have:

$test = file('my_txt_file.txt'); $randomized = $test[ mt_rand(0, count($test) - 1) ];

Then I can echo $randomized as needed throughout my page. But like I said my issue is I DO NOT want it random, but line by line in order, looping endlessly. Any thoughts on this??

When do you want the value to change? On each page load?

salathe
– salathe

2011-03-31 12:13:10 +00:00
Commented Mar 31, 2011 at 12:13 — salathe
– salathe, Commented Mar 31, 2011 at 12:13

Matt · Accepted Answer · 2011-03-29 17:38:37Z

Use iterators from SPL: http://us.php.net/manual/en/class.infiniteiterator.php

$test = file('my_txt_file.txt'); // this allows you to loop endlessly (vs. ArrayIterator) $lineIterator = new InfiniteIterator($test); // ... // Later where you want to use the current line echo $lineIterator->current(); $lineIterator->next(); // prepare for next call

This method let's you arbitrarily access the array without having an explicit list. So you can write the echo line (or some variation) anywhere. Should be better than a for loop from what I understand about your question.

If you don't have SPL, obviously you would have to define your own iterator class to use this method.

Joel Lee · Accepted Answer · 2011-03-29 17:45:42Z

1

If you don't have SPL, you could do this:

$test = file('my_txt_file.txt'); $test_counter = 0; // Whenever you want to output a line: echo $test[$test_counter++ % count($test)];

Will work for over 2 billion iterations.

answered Mar 29, 2011 at 17:45

Joel Lee

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2 Comments

Matt Over a year ago

Good alternative to my answer!

Joel Lee Over a year ago

@Matt - Would have added as comment to your answer, except that format for comments is too limited.

Naftali · Accepted Answer · 2011-03-29 17:36:35Z

you can use a for loop:

for($i = 0; $i < count($test); $i++){ echo $test[$i]; //display the line if(($i + 1) >= count($test)) $i = -1; //makes the loop infinite //if you don't want it to be infinite remove the above line }

Jordan · Accepted Answer · 2011-03-29 17:42:09Z

0

<?php $test = file('test.txt'); for ($i = 0; $i < count($test); $i++) { echo $test[$i]; if ($i == (count($test)-1)) { $i = -1; } } ?>

edited Mar 29, 2011 at 17:42

answered Mar 29, 2011 at 17:38

Jordan

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1 Comment

Naftali Over a year ago

nice going repeating answers :-p (im sure u ddnt mean it ^_^)

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