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@ 2014-06-13T04:05:14Z

<?php

preg_match(
    '/
        \\b     # word boundary
        href    # "href" attribute
        \\s*    # optional whitespace
        =       # literal "="
        \\s*    # optional whitespace
        (["\']) # open quote (captured for later backreference)
        ([^"\']+)
        \\1     # the same quote character as the opening quote
    /x',
    'href=\'/\'',
    $matches
);

print_r($matches);

Output
Performance
VLD
References
Branches

preg_match: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

30.63 ms | 402 KiB | 5 Q