Extract tabular data using regular expressions [closed] - php

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I have a text file with multiple occurrences of tables like show below:
_____________________________________
Heading 1 | Heading 2
_______________ | ___________________
Label1 18857.10 | Label3 710.00
Label2 2361.50 | Label4 0.00
| Label5 2531.37
| Label6 0.00
| Label7 0.00
| Label8 0.01
________________| ___________________
16495.60 | Label9 3969.06
_______________ | ___________________
I want to store the numerical values into variables using regular expressions. Since I'm new to regular expressions, I couldn't find a way to do it. Can anyone help me with this?

Answer 1

$table="_____________________________________
Heading 1 | Heading 2
_______________ | ___________________
Label1 18857.10 | Label3 710.00
Label2 2361.50 | Label4 0.00
| Label5 2531.37
| Label6 0.00
| Label7 0.00
| Label8 0.01
________________| ___________________
16495.60 | Label9 3969.06
_______________ | ___________________
";
$num = preg_match_all('/(\w+) (\d+(\.\d+)?)/', $table, $result);
for($i=0; $i<$num; $i++){
echo "{$result[1][$i]} = {$result[2][$i]}<br>";
}
If your table is exactly what you showed, this works.
regex: /(\w+) (\d+(\.\d+)?)/
Slashes / at the begining and end are delimiting the regex.
(\w+) means, "match any letter,number or underscore once or more times
one space follows, you can add + after the space, to match more then one, or put \s instead of space, to match any white character, like tab for example..
(\d+(\.\d+)?) ... \d+ means one or more digits, (\.\d+) means dot followed by one or more digits, question mark means that the previous parenthesis (\.\d+) is optional.
Preg_match_all stores those matches in third parameter and returns number of matches. In $result[$i][0] is the whole match, $result[$i][1] is first sub-expression (\w+), $result[$i][2] is second parenthesis (\d+(\.\d+)?), $result[$i][3] is the decimal part (\.\d+), it is inside $result[$i][2], but you don't need $result[$i][3], just for explanation :)
The code prints:
Heading = 1
Heading = 2
Label1 = 18857.10
Label3 = 710.00
Label2 = 2361.50
Label4 = 0.00
Label5 = 2531.37
Label6 = 0.00
Label7 = 0.00
Label8 = 0.01
Label9 = 3969.06
edit: sorry, it doesn't work, it didn't match that naked 16495.60 value. Let me think a bit more...
...
$regex='/([a-zA-Z0-9]+)? +(\d+(\.\d+)?)/';
is bit better, here's how it works:
[a-zA-Z0-9]+ matches non-zero ammount of letters or numbers
? after parenthesis means, the whole parenthesis expression is optional.
+ one or more spaces
(\d+(\.\d+)?) non-zero ammount of digits followed by optional { dot and another non-zero ammount of digits }
This whole regex does not include | or new-line, so all matching should happen in only one field of the table.
The result variable should be:
array (size=4)
0 =>
array (size=12)
0 => string 'Heading 1' (length=9)
1 => string 'Heading 2' (length=9)
2 => string 'Label1 18857.10' (length=15)
3 => string 'Label3 710.00' (length=13)
4 => string 'Label2 2361.50' (length=14)
5 => string 'Label4 0.00' (length=11)
6 => string 'Label5 2531.37' (length=14)
7 => string 'Label6 0.00' (length=11)
8 => string 'Label7 0.00' (length=11)
9 => string 'Label8 0.01' (length=11)
10 => string ' 16495.60' (length=19)
11 => string 'Label9 3969.06' (length=14)
1 =>
array (size=12)
0 => string 'Heading' (length=7)
1 => string 'Heading' (length=7)
2 => string 'Label1' (length=6)
3 => string 'Label3' (length=6)
4 => string 'Label2' (length=6)
5 => string 'Label4' (length=6)
6 => string 'Label5' (length=6)
7 => string 'Label6' (length=6)
8 => string 'Label7' (length=6)
9 => string 'Label8' (length=6)
10 => string '' (length=0)
11 => string 'Label9' (length=6)
2 =>
array (size=12)
0 => string '1' (length=1)
1 => string '2' (length=1)
2 => string '18857.10' (length=8)
3 => string '710.00' (length=6)
4 => string '2361.50' (length=7)
5 => string '0.00' (length=4)
6 => string '2531.37' (length=7)
7 => string '0.00' (length=4)
8 => string '0.00' (length=4)
9 => string '0.01' (length=4)
10 => string '16495.60' (length=8)
11 => string '3969.06' (length=7)
3 =>
array (size=12)
0 => string '' (length=0)
1 => string '' (length=0)
2 => string '.10' (length=3)
3 => string '.00' (length=3)
4 => string '.50' (length=3)
5 => string '.00' (length=3)
6 => string '.37' (length=3)
7 => string '.00' (length=3)
8 => string '.00' (length=3)
9 => string '.01' (length=3)
10 => string '.60' (length=3)
11 => string '.06' (length=3)
edit2: GRAB THOSE SNIPPETS AGAIN! There should be a backslash before the dot, in (\.\d+)!!! I formated it wrong and it disappeared.** Rewrote it, should be fine now.