I am trying to write some PHP code that will separate words when the are two with "&" and a comma when they are three and the last two with "&"
Something like this
$string = "stack over flow";
Print on screen like this "stack, over & flow";
Hope you noticed the comma and the ampersand.
Then when they are two words
$string = "stack overflow";
print like this echo "stack & overflow";
Here is my code I have been trying, but I am not getting it right:
$string = '1,2';
$list = explode(',',$string);
foreach($list as $row) {
if($list = 2) {
echo ''.$row.' &';
}
}
This should take into account the possibilities of one or more words. If there is more than one word, just remove the last word (using array_pop()) and implode() with , the remaining words.
If there is only 1 word, the result is the same as the original string...
$string = "stack over";
$list = explode(" ", $string);
if ( count($list) > 1 ) {
$last = array_pop($list);
$result = implode(", ", $list) . " & {$last}";
}
else {
$result = $string;
}
To add anchor tags to each word...
$list = explode(" ", $string);
$aTag = '<a href="#">';
if ( count($list) > 1 ) {
$last = array_pop($list);
$result = $aTag.
implode("</a>, {$aTag}", $list) . "</a> & {$aTag}{$last}</a>";
}
else {
$result = $aTag.$string."</a>";
}
echo $result;
thanks Nigel Ren.. you code was really helpfully
but their a correction i made.Here
$string = "stack over flow";
$list = explode(" ", $string);
$aTag = '<a href="#">';
if ( count($list) > 1 ) {
$last = array_pop($list);
$result = $aTag.
implode('</a>, '.$aTag.'', $list) . "</a> & {$aTag}{$last}</a>";
}
else {
$result = $aTag.$string."</a>";
}
echo $result;
thanks
I need to create a new array called ar1 with the items: [Dublin, Budapest, Copenhagen] and ar2 with [Ireland, Hungary, Denmark] after than answer with a string containing each country from the countries-array followed by the corresponding capital. Use the format "country = capital,
* country = capital..."
Check code below but i know that is another way to doing that ex. For loop but can someone explain me how?
$ar1 = ["Dublin", "Budapest", "Copenhagen"];
$ar2 = ["Ireland", "Hungary", "Denmark"];
$ANSWER = $ar2[0] . " = " . $ar1[0] . ", " . $ar2[1] . " = " . $ar1[1]. ", " . $ar2[2] . " = " . $ar1[2];
You should use a foreach and the key.
$ar1 = ["Dublin", "Budapest", "Copenhagen"];
$ar2 = ["Ireland", "Hungary", "Denmark"];
$ANSWER = '';
foreach($ar1 as $key => $capital) {
$ANSWER .= $ar2[$key] . ' = ' . $capital . ', ';
}
echo rtrim($ANSWER, ', ');
... and then rtrim to remove the last ,.
https://3v4l.org/f8PJN
Another way to do it using array_combine()
<?php
$ar1 = ["Dublin", "Budapest", "Copenhagen"];
$ar2 = ["Ireland", "Hungary", "Denmark"];
$result = array_combine($ar2,$ar1);
$ANSWER = '';
$i = 0;
$comma = ', ';
$len = count($result);
foreach($result as $country => $capital) {
if ($i == $len - 1){
$comma='';
}
$ANSWER .= $country . ' = ' . $capital.$comma;
$i++;
}
echo $ANSWER;
DEMO: https://3v4l.org/WGtJ3
Using array_map()
$ar1 = ["Dublin", "Budapest", "Copenhagen"];
$ar2 = ["Ireland", "Hungary", "Denmark"];
$input = array_combine($ar2,$ar1);
$output = implode(', ', array_map(
function ($v, $k) { return sprintf("%s=%s", $k, $v); },
$input,
array_keys($input)
));
echo $output;
DEMO: https://3v4l.org/qps1G
More fast and simple way:
$countries=["Ireland", "Hungary", "Denmark"];
$capitals=["Dublin", "Budapest", "Copenhagen"];
$string=implode(',',array_map(function($country,$capital){ return "$country=$capital";},$countries,$capitals));
var_dump($string);
output:
string(50) "Ireland=Dublin,Hungary=Budapest,Denmark=Copenhagen"
If you've got two related lists in separate variables, it's often easier to transpose them into a single structure first. In PHP, you can do this like so:
$transposed = array_map(null, $ar1, $ar2);
Once they're combined, it's a lot more simple to generate the required output:
echo implode(', ', array_map(function($row) {
return "{$row[1]} = {$row[0]}";
}, $transposed));
Ireland = Dublin, Hungary = Budapest, Denmark = Copenhagen
See https://3v4l.org/LfvIY
I have a string that looks like this:
$str = "Col1, Col2, Col3";
My question is how can I make it look like this
FORMAT(SUM('Col1'),2),FORMAT(SUM('Col2'),2),FORMAT(SUM('Col3'),2)
I am trying to use implode and explode but it's not working for me.
Here is my attempt:
$sample = "Col1, Col2, Col3";
$test = explode(",", $sample);
$test = "'" . implode("', FORMAT(SUM('", $test) . "), 2";
$sample = "Col1,Col2,Col3";
$test= explode(',',$sample);
$_test = '';
foreach($test as $t){
$_test .= "FORMAT(SUM('$t'),2),";
}
$_test = rtrim($_test,',');
I dont know if you can achiev this using explode, but you for sure can using a foreach loop.
$sample = 'Col1,Col2,Col3';
$result = '';
$parts = explode(',', $sample);
foreach ($parts as $part) {
$result .= 'FORMAT(SUM(' . $part . '), 2)';
$result .= (end($parts) !== $part) ? ', ' : '';
}
This runs over each part of the exploded array and adds the desired string plus a comma if its not the last element.
You can also use array_walk to achieve the requested result:
$sample = 'Col1,Col2,Col3';
$parts = explode(',', $sample);
$str = '';
array_walk($parts, function ($element) use (&$str) {
$str .= 'FORMAT(SUM(' . $element . '), 2), ';
});
$result = rtrim($str, ', ');
EXAMPLE:
input = 2
text = aa bb cc
Will become: aa cc
The input for position is $_POST['position']
i have
$words = explode(" ", $_POST['string']);
for ($i=0; $i<count($words); $i++){
echo $words[$i] . " ";
}
$to_remove = 2;
$text = "aa bb cc";
$words = explode(' ', $text);
if(isset($words[$to_remove -1])) unset($words[$to_remove -1]);
$text = implode(' ', $words);
Pulling out the big guns REGEX !!!
$string = 'aa bb cc dd';
$input = 2;
$regex = $input - 1;
echo preg_replace('#^((?:\S+\s+){'.$regex.'})(\S+\s*)#', '$1', $string);
Output: aa cc dd
Foreach loops tend to make it a little easier to understand (IMO). Looks cleaner too.
$pos = 2;
$sentence = explode(" ", $_POST['string']);
foreach ($sentence as $index => $word) {
if ($index != $pos - 1) {
$result .= $word . ' ';
}
}
echo $result;
This sounds like a homework question. I'll take a stab at it though:
Code:
<?php
$string = trim($_POST['string']);
$parts = explode(" ", string);
$newString = "";
$position = intval($_POST['position']);
for($a = 0; $a < count($parts); $a++) {
if($a != $position) { // or $a != ($position - 1) depending on if you passed in zero based position
$newString = $newString . $parts[$a] . " ";
}
}
$newString = trim($newString);
echo "Old String: " . $string . "<br />";
echo "New String: " . $newString;
?>
Output:
Old String: aa bb cc
New String: aa cc
$input = 2;
$words = explode(" ", $_POST['string']);
unset($words[$input-1]);
$words = implode(" ", $words);
echo $words;
I often need to list items separated by comma, space or punctuation, addresses are a classic example (This is overkill for an address and is for the sake of an example!):
echo "L$level, $unit/$num $street, $suburb, $state $postcode, $country.";
//ouput: L2, 1/123 Cool St, Funky Town, ABC 2000, Australia.
As simple as it sounds, is there an easy way to "conditionally" add the custom separators between variables only if the variable exists? Is it necessary to check if each variable is set? So using the above, another address with less detail may output something like:
//L, / Cool St, , ABC , .
A slightly arduous way of checking would be to see if each variable is set and display the punctuation.
if($level){ echo "L$level, "; }
if($unit){ echo "$unit"; }
if($unit && $street){ echo "/"; }
if($street){ echo "$street, "; }
if($suburb){ echo "$suburb, "; }
//etc...
It would be good to have a function that could automatically do all the stripping/formatting etc:
somefunction("$unit/$num $street, $suburb, $state $postcode, $country.");
Another example is a simple csv list. I want to output x items separated by comma:
for($i=0; $i=<5; $i++;){ echo "$i,"; }
//output: 1,2,3,4,5,
In a loop for example, what's the best way of determining the last item of an array or the loop condition is met to not include a comma at the end of the list? One long way around this I've read of is to put a comma before an item, except the first entry something like:
$firstItem = true; //first item shouldn't have comma
for($i=0; $i=<5; $i++;){
if(!$firstItem){ echo ","; }
echo "$i";
$firstItem = false;
}
For your first example, you can use arrays in conjunction with a few of the array methods to get the desired result. For example:
echo join(', ', array_filter(array("L$level", join(' ', array_filter(array(join('/', array_filter(array($unit, $num))), $street))), $suburb, join(' ', array_filter(array($state, $postcode))), $country))) . '.';
This one-liner is quite complicated to read, so one can always wrap the array, array_filter and join calls into a separate method, and use that:
function merge($delimiter)
{
$args = func_get_args();
array_shift($args);
return join($delimiter, array_filter($args));
}
echo merge(', ', "L$level", merge(' ', merge('/', $unit, $num), $street), $suburb, merge(' ', $state, $postcode), $country) . '.';
You need the array_filter calls to remove the empty entries, otherwise the delimeters would still be printed out.
For your second example, add the items to an array, then use join to insert the delimeter:
$arr = array();
for($i=0; $i=<5; $i++)
{
$arr[] = $i;
}
echo(join(',', $arr));
While Phillip's answer addresses your question, I wanted to supplement it with the following blog post by Eric Lippert. Although his discussion is in c#, it applies to any programming language.
There's a simple solution to your second problem:
for($i=0; $i<=5; $i++)
$o .= "$i,";
echo chop($o, ',');
ok, take that! (but not too serious ^^)
<?php
function bothOrSingle($left, $infix, $right) {
return $left && $right ? $left . $infix . $right : ($left ? $left : ($right ? $right : null));
}
function leftOrNull($left, $postfix) {
return $left ? $left . $postfix : null;
}
function rightOrNull($prefix, $right) {
return $right ? $prefix . $right : null;
}
function joinargs() {
$args = func_get_args();
foreach ($args as $key => $arg)
if (!trim($arg))
unset($args[$key]);
$sep = array_shift($args);
return join($sep, $args);
}
$level = 2;
$unit = 1;
$num = 123;
$street = 'Cool St';
$suburb = 'Funky Town';
$state = 'ABC';
$postcode = 2000;
$country = 'Australia';
echo "\n" . '"' . joinargs(', ', rightOrNull('L', $level), bothOrSingle(bothOrSingle($unit, '/', $num), ' ', $street), bothOrSingle($state, ' ', $postcode), bothOrSingle($country, '', '.')) . '"';
// -> "L2, 1/123 Cool St, ABC 2000, Australia."
$level = '';
$unit = '';
$num = '';
$street = 'Cool St';
$suburb = '';
$state = 'ABC';
$postcode = '';
$country = '';
echo "\n" . '"' . joinargs(
', ',
leftOrNull(
joinargs(', ',
rightOrNull('L', $level),
bothOrSingle(bothOrSingle($unit, '/', $num), ' ', $street),
bothOrSingle($state, ' ', $postcode),
$country
),
'.'
)
) . '"';
// -> "Cool St, ABC."
$level = '';
$unit = '';
$num = '';
$street = '';
$suburb = '';
$state = '';
$postcode = '';
$country = '';
echo "\n" . '"' . joinargs(
', ',
leftOrNull(
joinargs(', ',
rightOrNull('L', $level),
bothOrSingle(bothOrSingle($unit, '/', $num), ' ', $street),
bothOrSingle($state, ' ', $postcode),
$country
),
'.'
)
) . '"';
// -> "" (even without the dot!)
?>
yes, i know - looks a bit like brainfuck.
Philip's solution is probably best when working with arrays (if you don't have to filter out empty values), but if you can't use the array functions--for instance, when dealing with query results returned from mysqli_fetch_object()--then one solution is just a simple if statement:
$list = '';
$row=mysqli_fetch_object($result);
do {
$list .= (empty($list) ? $row->col : ", {$row->col}");
} while ($row=mysqli_fetch_object($result));
Or, alternatively:
do {
if (isset($list)) {
$list .= ", {$row->col}";
} else $list = $row->col;
} while ($row=mysqli_fetch_object($result));
To build a list and filter out empty values, I would write a custom function:
function makeList() {
$args = array_filter(func_get_args()); // as per Jon Benedicto's answer
foreach ($args as $item) {
if (isset($list)) {
$list .= ", $item";
} else {
$list = $item;
}
}
if (isset($list)) {
return $list;
} else return '';
}
Then you can call it like so:
$unitnum = implode('/',array_filter(array($unit,$num)));
if ($unitnum || $street) {
$streetaddress = trim("$unitnum $street");
} else $streetaddress = '';
if ($level) {
$level = "L$level";
}
echo makeList($level, $streetaddress, $suburb, $state $postcode, $country).'.';
I always find that its both faster and easier to use the language's array methods. For instance, in PHP:
<?php
echo join(',', array('L'.$level, $unit.'/'.$num,
$street, $suburb, $state, $postcode, $country));
Just take out the last comma, i.e replace it with nothing.
$string1 = "L$level, $unit/$num $street, $suburb, $state $postcode, $country.";
$string1 = eregi_replace(", \.$", "\.", $string1);
echo $string1;
This will do the work.
<?php
$level = 'foo';
$street = 'bar';
$num = 'num';
$unit = '';
// #1: unreadable and unelegant, with arrays
$values = array();
$values[] = $level ? 'L' . $level : null;
// not very readable ...
$values[] = $unit && $num ? $unit . '/' . $num : ($unit ? $unit : ($num ? $num : null));
$values[] = $street ? $street : null;
echo join(',', $values);
// #2: or, even more unreadable and unelegant, with string concenation
echo trim(
($level ? 'L' . $level . ', ' : '') .
($unit && $num ? $unit . '/' . $num . ', ' : ($unit ? $unit . ', ' : ($num ? $num . ', ': '')) .
($street ? $street . ', ': '')), ' ,');
// #3: hey, i didn't even know that worked (roughly the same as #1):
echo join(', ', array(
$level ? 'L' . $level : null,
$unit && $num ? $unit . '/' . $num : ($unit ? $unit : ($num ? $num : null)),
$street ? $street : null
));
?>