Is there a way to capitalize every other letter in a string? I am familiar with converting to lowercase or uppercase, as well as capitalizing the first letter, but I am unsure about how to handle every other one. Just for clarification, I have provided examples below. This question pertains to developing a cipher that my son and I are experimenting with - not for normal text formatting purposes.
pizza -> PiZzA
party -> PaRtY
popcorn -> PoPcOrN
$outputString = '';
foreach(str_split($inputString) as $pos => $character) {
$outputString .= ($pos % 2) ? strtolower($character) : strtoupper($character);
}
CodeBox.
Here is a method I will attempt:
$string = join(
array_map(
function($s){
return ucfirst($s);
},
str_split($string,2)
)
);
Alternatively, as a one-liner:
$string = join(array_map(function($s){return ucfirst($s);}, str_split($string,2)));
You can make the function more general by passing the chunk length to be capitalized as a parameter and letting the function handle the rest. The logic behind this algorithm is simple:
The completed function looks like this:
function camelCycles($string, $period) {
return join(
array_map(
function($s){
return ucfirst($s);
},
str_split($string, $period)
)
);
}
This function utilizes only built-in constructs and should therefore run efficiently.
EDIT:
For compatibility with PHP 5.0 onward (since str_split was introduced in php5), here is an alternative function that doesn't use lambda expressions:
function camelCycles($string, $span) {
return join(array_map('ucfirst', str_split(strtolower($string), $span)));
}
To modify the text, I propose dissecting it into an array and then piecing it back together:
function changeToLowerCase($str){
$temp = explode('',$str);
$result = '';
foreach($temp as $i=>$val){
if($i%1 == 0) $result .= strtolower($val);
else $result .= strtolower($val);
}
return $result;
}
function modifyString($str)
{
$result = '';
$flag = false;
foreach(str_split($str) as $char)
{
$result .= ($flag ? strtoupper($char) : $char);
$flag = !$flag;
}
return $result;
}
echo modifyString("hello there, mr person sir");
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