blocks|key|1792435|text|你可以使用..|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1792436|<?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;
?>|code-block|syntax|javascript|1792437|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use..

<pre><code>&lt;?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;
?&gt;
</code></pre>

blocks|key|1577439|text|要提取完整的单词，您需要使用单词边界和字符类来匹配单词的其余部分，并使用lookbehinds来排除先前的内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1577440|$string+=+"Hello+my+Name+is+Paloppa.+I'm+20+And?+Hello!+Words'+Man";+++++
//+Word+boundary+before+the+first+uppercase+letter,+followed+by+any+alphanumeric+character
preg_match_all(+'/(?<!%5E)(?<!\.+)\b[A-Z][a-zA-Z]*\b(?!["!?\\\'])/',+$string,+$matches);
print_r(+$matches[0]+);|code-block|syntax|javascript|1577441|如果您只需要大写的单词，不需要MixedCase单词，请仅用[a-z]替换[a-zA-Z]。|offset|length|style|CODE|1577442|演示here|1577443|entityMap|0|LINK|mutability|MUTABLE|url|https://3v4l.org/58nId^0|0|0|U|5|11|8|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]|$I|11|J|12|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@$I|14|J|15|1|16]]|A|$]]|$1|O|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

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:

<pre><code>$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( '/(?&lt;!^)(?&lt;!\. )\b[A-Z][a-zA-Z]*\b(?!["!?\\\'])/', $string, $matches);
print_r( $matches[0] );
</code></pre>

If you want Capitalized words only, excluding MixedCase words, replace <code>[a-zA-Z]</code> with just <code>[a-z]</code>.

Demo <a href="https://3v4l.org/58nId" rel="nofollow noreferrer">here</a>

blocks|key|1792472|text|你可以用最快的方式使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1792473|$test="Hi+There+this+Is+my+First+Job";
preg_match_all('/[A-Z][a-z]*/',+$test,+$matches,+PREG_OFFSET_CAPTURE);

$res=array();

foreach(+$matches[0]+as+$key=>+$value){

++++$res[]=$value[0];
}

print_r($res);|code-block|syntax|javascript|1792474|输出：|1792475|++Array
(
++++[0]+=>+Hi
++++[1]+=>+There
++++[2]+=>+Is
++++[3]+=>+First
++++[4]+=>+Job
)|1792476|DEMO|offset|length|1792477|entityMap|0|LINK|mutability|MUTABLE|url|http://sandbox.onlinephpfunctions.com/code/1f4e0c41bf438e625cdd93bfeb71a90065d14df4^0|0|0|0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

You can fastest way use.

<pre><code>$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=&gt; $value){

 $res[]=$value[0];
}

print_r($res);

</code></pre>

OUTPUT: 

<pre><code> Array
(
 [0] =&gt; Hi
 [1] =&gt; There
 [2] =&gt; Is
 [3] =&gt; First
 [4] =&gt; Job
)

</code></pre>

<a href="http://sandbox.onlinephpfunctions.com/code/1f4e0c41bf438e625cdd93bfeb71a90065d14df4" rel="nofollow noreferrer">DEMO</a>

blocks|key|1792479|text|当涉及到边缘情况时，这有点复杂，但我们可以简单地根据所需的输出和输入定义两个char类，可能带有一个单词边界，表达式类似于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1792480|(?=[%5EI'])\b([A-Z][a-z'é]%2B)\b|code-block|syntax|javascript|1792481|我们会根据我们的案例来扩展它。|1792482|Demo|offset|length|1792483|测试|1792484|$re+=+'/(?=[%5EI\'])\b([A-Z][a-z\'é]%2B)\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);|1792485|RegEx电路|1792486|jex.im可视化正则表达式：|1792487|​|1792488|📷|atomic|1792489|1792490|entityMap|0|LINK|mutability|MUTABLE|url|https://regex101.com/r/Vaijcj/1/|1|https://jex.im/regulex/#!flags=&re=%5E(a%7Cb)*?$|2|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6827b579568d24e93ff721cf5d8e4732.png|imageAlt^0|0|0|0|0|4|0|0|0|0|0|0|6|1|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1H|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1I|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|1J|8|@]|9|@$K|1K|L|1L|1|1M]]|A|$]]|$1|M|3|N|5|6|7|1N|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1O|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|1P|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1Q|8|@]|9|@$K|1R|L|1S|1|1T]]|A|$]]|$1|U|3|V|5|6|7|1U|8|@]|9|@]|A|$]]|$1|W|3|X|5|Y|7|1V|8|@]|9|@$K|1W|L|1X|1|1Y]]|A|$]]|$1|Z|3|V|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|20|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]|18|$5|13|14|15|A|$16|19]]|1A|$5|1B|14|1C|A|$1D|1E|1F|-4]]]]

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:
<pre><code>(?=[^I'])\b([A-Z][a-z'é]+)\b
</code></pre>
and we would expand it based on our cases.
<h3><a href="https://regex101.com/r/Vaijcj/1/" rel="nofollow noreferrer">Demo</a></h3>
<h3>Test</h3>
<pre><code>$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);
</code></pre>
<h3>RegEx Circuit</h3>
<a href="https://jex.im/regulex/#!flags=&amp;re=%5E(a%7Cb)*%3F%24" rel="nofollow noreferrer">jex.im</a> visualizes regular expressions:
<a href="https://i.stack.imgur.com/SsB0h.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SsB0h.png" alt="enter image description here" /></a>

Edit i resolve my problem. 
This is the solution

<pre><code>$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( '/(?&lt;!^)\b[A-Z][a-z]{1,}\b(?!["!?.\\\'])/', $string, $matches);
print_r( $matches[0] );
</code></pre>

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 

<pre><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( '/(?&lt;!^)\b([A-Z][a-z]+ +){1,}\b(?!["!?.\\\'])/', $string, $matches);
print_r( $matches[0] );
</code></pre>

the output is the following

<pre><code>Array ( 
 [0] =&gt; Name 
 [1] =&gt; Name And Surname 
 [2] =&gt; Paolo Celio 
 [3] =&gt; Serie 
 [4] =&gt; Iim 
 [5] =&gt; Thanksbro Bro 
 )
</code></pre>

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

<pre><code>preg_match_all('/(?&lt;!^)\b[A-Z]([a-z0-9A-Z]| [A-Z]){1,}\b(?!["!?.\\\'])/', $string, $matches);
</code></pre>

Extract uppercase words from a string

编辑我解决我的问题。这就是解决方案$string = "Hello my Name is Paloppa. Im' 20 And? Hello! Words I  Io Man";     // Word boundary before the first uppercase letter, followed by a...

问从字符串中提取大写单词
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