CODEWITHSUNDEEP
phpregexpreg-match-all
a0z0ra
a0z0ra

Reputation: 171

PHP preg_match_all failing

I'm trying to extract ID from a possibly huge text, what did I miss?

preg_match_all('/(ID\s\d+)/', "ID 20380843, ID ​20675712", $matches);
print_r( $matches[0] );

Only return:

Array
(
    [0] => ID 20380843
)

Instead of:

Array
(
    [0] => ID 20380843
    [1] => ID 20675712
)

Upvotes: 2

Views: 85

Answers (3)

cincodenada
cincodenada

Reputation: 3097

Your problem isn't preg_replace_all, it's your source file. There's an invisible unicode character in the second ID - you can see by copy/pasting it into this Unicode Converter, you'll see U+200B show up in various forms in the lower boxes:

Unicode U+hex notation
preg_match_all('/(ID\s\d+)/', "ID 20380843, ID U+200B^20675712", $matches);

(emphasis mine)

This is the Unicode Zero-Width Spaaace, which is apparently not included in \s as PHP's PREG defines it.

Upvotes: 2

Martijn
Martijn

Reputation: 16123

Did you copy that string from your code? Because there is something sneaky happening.
When I copied the code to my editor, it gave me this for string:

"ID 20380843, ID ?20675712"

As you can see, there is a questionmark-sign in the 2nd, thus failing your expression :)

Upvotes: 4

Nambi
Nambi

Reputation: 12040

print_r(matches) instead of print_r(matches[0]);

try

preg_match_all('/(ID\s\d+)/', "ID 20380843, ID ​20675712", $matches);
print_r( $matches );

Upvotes: 0

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