This question already has an answer here:
The preg_replace() function has so many possible values, like:
<?php
$patterns = array('/(19|20)(\d{2})-(\d{1,2})-(\d{1,2})/', '/^\s*{(\w+)}\s*=/');
$replace = array('\3/\4/\1\2', '$\1 =');
echo preg_replace($patterns, $replace, '{startDate} = 1999-5-27');
What does:
\3/\4/\1\2
And:
/(19|20)(\d{2})-(\d{1,2})-(\d{1,2})/','/^\s*{(\w+)}\s*=/
mean?
Is there any information available to help understand the meanings at one place? Any help or documents would be appreciated! Thanks in Advance.
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