str_replace function wont replace string if i use single quotes
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        Published on 2010-06-02T11:18:51Z
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            2010/06/02
            11:23 UTC
        
        
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php
|str-replace
I using php's str_replace function to replace some text. Example below.
str_replace("{x+{\$v}}", "{x-{\$v}}", $this->introtext);
str_replace('{x+{\$v}}', '{x-{\$v}}', $this->introtext);
In first case it replace text, but in second case it is not doing so. What is difference between two?
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