blocks|key|717008|text|看一看str_replace|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|717009|$abc+=+'+Hello+"Guys"+,+Goodmorning';
$abc+=+str_replace('"',+'$%5E',+$abc);|code-block|syntax|javascript|717010|entityMap|0|LINK|mutability|MUTABLE|url|http://au2.php.net/manual/en/function.str-replace.php^0|3|B|3|B|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Have a look at <a href="http://au2.php.net/manual/en/function.str-replace.php" rel="nofollow noreferrer"><code>str_replace</code></a>

<pre><code>$abc = ' Hello "Guys" , Goodmorning';
$abc = str_replace('"', '$^', $abc);
</code></pre>

blocks|key|717026|text|preg_replace('/"/',+'$%5E',+$abc);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|717027|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>preg_replace('/"/', '$^', $abc);
</code></pre>

blocks|key|933097|text|str_replace('"','$%5E',$abc);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|933098|对你来说应该很管用。|unstyled|933099|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>str_replace('"','$^',$abc);
</code></pre>

Should work for you.

blocks|key|933126|text|Searching+the+manual会把你带到这里：http://php.net/manual/en/function.str-replace.php|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|933127|str_replace('"',+'$%5E',+$abc);|code-block|syntax|javascript|933128|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual-lookup.php?pattern=string_replace&lang=en|1|http://php.net/manual/en/function.str-replace.php^0|0|K|0|S|1D|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

<a href="http://php.net/manual-lookup.php?pattern=string_replace&amp;lang=en" rel="nofollow">Searching the manual</a> would have brought you to this: <a href="http://php.net/manual/en/function.str-replace.php" rel="nofollow">http://php.net/manual/en/function.str-replace.php</a>

<pre><code>str_replace('"', '$^', $abc);
</code></pre>

blocks|key|717113|text|您可以使用str_replace|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|717114|$abc+=+'+Hello+"Guys"+,+Goodmorning';
echo+str_replace('"','$%5E',$abc);|code-block|syntax|javascript|717115|entityMap|0|LINK|mutability|MUTABLE|url|http://de3.php.net/manual/de/function.str-replace.php^0|5|B|5|B|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

You can use <a href="http://de3.php.net/manual/de/function.str-replace.php" rel="nofollow"><code>str_replace</code></a>:

<pre><code>$abc = ' Hello "Guys" , Goodmorning';
echo str_replace('"','$^',$abc);
</code></pre>

blocks|key|717161|text|字符串替换函数用于替换字符串。你的语法是错误的。你必须像下面的例子一样使用php+string+function。首先，考虑第一个和第二个值，并替换第三个值。让我们来看看。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|717162|<?php
echo+str_replace("Hello",+"HI",+"Hello+Jack+");+
?>|code-block|syntax|javascript|717163|它产生输出。|717164|HI+Jack.|717165|您可以创建HTML表单并仅在按钮上更改。|717166|<form>+
input+box+1+
input+box+2+
input+box+3+
button+

</form>|717167|另一个|717168|+str_replace('"','$%5E',$var);|717169|entityMap|0|LINK|mutability|MUTABLE|url|https://technosmarter.com/php/PHP-String-Functions.html^0|11|J|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|C|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|C|$]]|$1|S|3|T|5|F|7|1C|8|@]|9|@]|C|$G|H]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

String replace function is used to replace string. Your syntax is wrong. You have to use <a href="https://technosmarter.com/php/PHP-String-Functions.html" rel="nofollow noreferrer">php string function</a> like below example. First of all, think about first and two values and replace in third. Let's have a look. 

<pre><code>&lt;?php
echo str_replace("Hello", "HI", "Hello Jack "); 
?&gt;
</code></pre>

It produces the output. 

<pre><code>HI Jack.
</code></pre>

You can create an HTML form and change on button only. 

<pre><code>&lt;form&gt; 
input box 1 
input box 2 
input box 3 
button 

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

Another 

<pre><code> str_replace('"','$^',$var);
</code></pre>

I have this code:

<pre><code>$abc = ' Hello "Guys" , Goodmorning';
</code></pre>

I want to replace every occurrence of <code>"</code> (double quotes) by <code>$^</code> so that string becomes

<pre><code>'Hello $^Guys$^ , Goodmorning'
</code></pre>

I am new to PHP; in Java we can do this very easily by calling the string class <code>replaceAll</code> function, but how do I do it in PHP? I can't find the easy way on Google without using regular expressions.

What is some syntax with or without the use of regular expressions?

Simple PHP string replace?

我有这样的代码：$abc = ' Hello "Guys" , Goodmorning';我想用$^替换所有出现的" (双引号)，这样字符串就变成了'Hello $^Guys$^ , Goodmorning'我刚接触PHP；在java语言中，我们可以通过调用string类的replaceAll函数很容易做到这一点，但是...

问简单的PHP字符串替换？
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