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bluefrog

Using php to display image based on text number

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I have no idea how to properly describe this topic as I'm fairly new to php, but here is a description of what I am trying to do:

 

This is firstly for a wordpress functions file

 

Ok what I am trying to achieve is have a small piece of code (in this case a wordpress shortcode) read a number in plain text:

 

e.g. [myshortcode num=43] 

 

And replace the shortcode input (43) with an image named the same (43.jpg (http://www.mysite/path/43.jpg"))

 

This is for a lottery style site where I want to put my picks for the day so I have 49 numbers in total. And each number is currently a full line of html code - I really need to make input faster lol.

 

I have tried 'if and' I have tried 'if or' but I'm struggling. 

 

Anybody know how to take that and turn into a function? I know how to get it into wordpress and make it a shortcode, I just need help with the actual function side of things, my code was incredibly long and didnt work lol

 

Thank you all in advance :)

Edited by bluefrog

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Basically, instead of

$num = 43;
echo $num;            // --> 43

 
you would use

$num = 43;
echo "<img src='/path/$num.jpg'>";       // --> outputs image 43.jpg

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Sorry you'll have to bare with me, I'm not great with php as I said. How do I get the number into a variable? The number will literally just be written into a shortcode (which will be the same for each number) with the only difference being the number in the shortcode:

 

[myshortcode num=40] 

[myshortcode num=13] 

[myshortcode num=6] 

 

for example. 

 

Thanks in advance

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No I understand how to create and use a shortcode, I've done a few, I'm struggling with the function element. Barand suggests a good solution, however I'm a little confused as to how to correctly write the number from the shortcode to the function. 

 

Would something like this work:

function ball_number($atts,$content,$tag){
	
	
	$values = shortcode_atts(array(
		'ball' => ' '
	),$atts);  
	
	
	$output = '';
	if($values['ball'] == '1'){
		$output = 'image code for ball number 1';
	}
	else if($values['ball'] == '2'){
		$output = 'image code for ball number 2';
	}
	else if($values['ball'] == '3'){
		$output = 'image code for ball number 3';
	}
	else{
		$output = ' '; 
	}
	
	return $output;
	
}
add_shortcode('ball','ball_number');

Thanks for all of your input so far, it's appreciated :)

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Ah I got it. Is there a shorter version than this:

function ball_callback($atts,$content,$tag){
	
	//collect values, combining passed in values and defaults
	$values = shortcode_atts(array(
		'num' => 'other'
	),$atts);  
	
	
	//based on input determine what to return
	$output = '';
	if($values['num'] == '1'){
		$output = 'output for 1';
	}
	else if($values['num'] == '2'){
		$output = 'output for 2';
	}
	else if($values['num'] == '3'){
		$output = 'output for 3';
	}
	else{
		$output = ' '; 
	}
	
	return $output;
	
}
add_shortcode('ball','ball_callback');

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You could create an array of valid values and then run the test. For example

<?php
function ball_callback($atts,$content,$tag){
 
    //collect values, combining passed in values and defaults
    $values = shortcode_atts(array(
        'num' => 'other'
    ),$atts);  
 
 
    //based on input determine what to return
    $output     = '';
    $validValues = array('1', '2', '3');
    if(in_array($values['num'], $validValues)){
        $output = "output for {$values['num']}";
    }
 
    return $output;
 
}
add_shortcode('ball','ball_callback');
?>

Note that you could use range() to create the array for $validValues. More information can be found here:

http://php.net/manual/en/function.range.php

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