Extract uppercase words from a string - php

Question

Edit i resolve my problem.
This is the solution
$string = "Hello my Name is Paloppa. Im' 20 And? Hello! Words I Io Man";
// Word boundary before the first uppercase letter, followed by any alphanumeric character
preg_match_all( '/(?<!^)\b[A-Z][a-z]{1,}\b(?!["!?.\\\'])/', $string, $matches);
print_r( $matches[0] );
Now i have one more question
Every time it founds a word, the word is inserted in a position of the array.
If i have this phrase "Whats is your Name and Surname? My Name And Surname' is Paolo Celio and Serie A Iim 25 Thanksbro Bro Ciao"
this is my code
$string = "Whats is your Name and Surname? My Name And Surname' is Paolo Celio and Serie A Iim 25 Thanksbro Bro Ciao";
// Word boundary before the first uppercase letter, followed by any alphanumeric character
preg_match_all( '/(?<!^)\b([A-Z][a-z]+ +){1,}\b(?!["!?.\\\'])/', $string, $matches);
print_r( $matches[0] );
the output is the following
Array (
[0] => Name
[1] => Name And Surname
[2] => Paolo Celio
[3] => Serie
[4] => Iim
[5] => Thanksbro Bro
)
Why it doesn't join Serie A instead it didn't print A?
Why the last word doesn't in the output?
Thanks
EDIT
I resolve my problem, this is my REGEX
preg_match_all('/(?<!^)\b[A-Z]([a-z0-9A-Z]| [A-Z]){1,}\b(?!["!?.\\\'])/', $string, $matches);

Answer 1

You can use..
<?php
$test="the Quick brown Fox jumps Over the Lazy Dog";
preg_match_all("/[A-Z][a-z]*/",$test,$op);
$output = implode(' ',$op[0]);
echo $output;
?>

Answer 2

This is slightly complicated, when it comes to edge cases, yet we would simply define two char classes based on our desired outputs and inputs, maybe with a word boundary, with an expression similar to:
(?=[^I'])\b([A-Z][a-z'é]+)\b
and we would expand it based on our cases.
Demo
Test
$re = '/(?=[^I\'])\b([A-Z][a-z\'é]+)\b/m';
$str = 'Hello my name is Paloppa. I\'m 20 And i love Football.
Hello my name is Chloé. I\'m 20 And i love Football.
Hello my name is Renée O\'neal. I\'m 20 And i love Football.';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
var_dump($matches);
RegEx Circuit
jex.im visualizes regular expressions:

Answer 3

To extract full words you'll need to use word boundaries and character classes to match the remaining part of the word, and use lookbehinds to exclude previous content:
$string = "Hello my Name is Paloppa. I'm 20 And? Hello! Words' Man";
// Word boundary before the first uppercase letter, followed by any alphanumeric character
preg_match_all( '/(?<!^)(?<!\. )\b[A-Z][a-zA-Z]*\b(?!["!?\\\'])/', $string, $matches);
print_r( $matches[0] );
If you want Capitalized words only, excluding MixedCase words, replace [a-zA-Z] with just [a-z].
Demo here

Answer 4

You can fastest way use.
$test="Hi There this Is my First Job";
preg_match_all('/[A-Z][a-z]*/', $test, $matches, PREG_OFFSET_CAPTURE);
$res=array();
foreach( $matches[0] as $key=> $value){
$res[]=$value[0];
}
print_r($res);
OUTPUT:
Array
(
[0] => Hi
[1] => There
[2] => Is
[3] => First
[4] => Job
)
DEMO