Changing output text from array - php

Question

I'm currently printing table column names, filtered, but need to change the text for each.
For instance, the following:
$row = mysql_fetch_assoc($query_columns);
echo implode(', ', array_keys( array_filter( $row )));
outputs:
column_one, column_two, column_five
What I haven't been able to achieve, without a lengthy if statement, is a way to have complete control over the output, such as changing each...
Expected output:
This is column one, and Column two, but this is column five
Any help is much appreciated!
Table structure:
Category
--------
user_id
live_out
live_in
short_term
weekday
weekend
unsure
Current output (based on user selection):
live_out, live_in, weekday
Desired output:
Yes as live-out, Yes as live-in, Yes for regular weekdays

Answer 1

You have echo implode(', ', array_keys( array_filter( $row )));
The implode() uses the array to concatenate the keys to one string.
One solution would be to use string concatenation, when iterating the array:
$array = array_keys( array_filter( $row ))); // gets you the keys array
$string = 'This is ';
foreach($array as $item)
{
$string .= $item . ', '; // append item to string with comma added
}
$string .= '. That's all.';
echo $string;
If you want custom text per item, you need to detect the item when iterating.
You might use if and strpos() for that, like so:
$string = 'This is ';
foreach($array as $item)
{
$string .= $item . ', '; // append item to string with comma added
if(false !== strpos($item, 'Column One')) { // look for Column One in $item
$string .= ' (found column one)';
}
}
$string .= ' That's all.';
echo $string;
Replace:
$string = str_replace('Column One', 'Column XXX', $string);
works also for multiple items at once
$replace = array('Column One', 'Column Two');
$with = array('Column XX1', 'Column XX2');
$string = str_replace($replace, $with, $string);
Take care about $string = and $string .=.
The first assigns the value, the second appends the value.
Based on your table structure
$string = '';
foreach($array as $item)
{
if(false !== strpos($item, 'live_out')) {
$string .= 'Yes for '. $item . ', ';
}
if(false !== strpos($item, 'live_in')) {
$string .= 'Yes for '. $item . ', ';
}
if(false !== strpos($item, 'weekdays')) {
$string .= 'Yes for regular '. $item;
}
}
echo $string;

Answer 2

You can change each item in the array like this;
$column_names[0] = "Add this to the start of column one ". $column_names[0] . ", and this to the end of column one.";
0 is the first item in the array, and 1 is the second and so on.
Remember you need to do this to the array you get from array_keys in this case.
Otherwise you could make a function like this;
function addStrToArrayElements($array, $str_start, $str_end, $array_keys=NULL){
foreach($array as $key => $item){
if(array_key_exists($key, $array_keys) || is_null($array_keys) ){
$ret[$key] = $str_start.$item.$str_end;
}
}
return $ret;
}
$array is the array you want the elements to change on, $str_start is the string to put in front of the item, $str_end the on behind the item, and $array_keys is an array of the keys of which elements you want changed, if you leave it blank, it will do the same to all elements of $array.
For the example you have above you would do this:
$column_names = array_keys($row);
addStrToArrayElements($column_names, 'This is ', ',', array(0));
addStrToArrayElements($column_names, ' and ', ',', array(1));
addStrToArrayElements($column_names, ' but this is ', '', array(2));
$output = implode('', $column_names);
echo str_replace('column_', 'column ', $output);
That should output
This is column one, and column two, but this is column five

Answer 3

Say you have the following array called $array1 below:
<?php
$array1 = array("hey","its","me","so","what");
$newarray = array();
$i=0;
foreach ($array1 as $value)
{
$newarray[] = "<span id=" . "color$i" . ">" . $value . "</span>";
$i++;
}
echo implode(",",$newarray);
?>
You can use the algorithm to set different styles for all the columns using the spans created. So for instance you can set a style in the head or external stylesheet like so:
<style>
#color0{ color:red;}
#color1{ color:blue;}
#color2{ color:yellow;}
</style>
I tested this out and it seems to work just fine!