Split a string using regular expression

Beginners - Learning PHP
#1

Hello,

I would like to split a string using a regular expression.
the part i want to split is always 1 or more numbers followed by either an optional letter or a “-” (minus) followed by 1 or more numbers.

can anyone help me fix this?
examples:

test 123
test 1a
test 1
test 12-34

part 1 is always "test " and splitting on the space isnt an option because "test " is usually much longer with optional spaces and other characters in it.
part 2 in this example is always the part after "test "

thanks in advance

#2

You will need to show more useful test cases if

part 1 is always "test " and splitting on the space isnt an option because "test " is usually much longer with optional spaces and other characters in it.
Your tests show test always the same, if it isn't then you can specify what it might* be.
#3

[php]
$str = [
‘test 123’,
‘test 1a’,
‘test 1’,
‘test 12-34’
];
$ar = [];

foreach ( $str as $st ){
$pattern = ‘/test\s(\d{0,4}\s?-?\w{0,2})/’;
if(preg_match($pattern, $st, $match)){
array_push($ar, $match[1]);
}
}

echo “

”;

print_r($ar);

echo “
”;

[/php]

This works for your test cases, but that is the pattern you are showing.

#4

Thanks but that won’t work as “part 1” is more variable then just "test ".
Better examples are:

test 123
test test 12a
t.st test 12-34
test-test 1

#5

[php]$str = [
‘test 123’,
‘test test 12a’,
‘t.st test 12-34’,
‘test-test 1’,
];
$ar = [];

foreach ( $str as $st ){
$pattern = ‘/(\d{0,4}\s?-?\w{0,2})$/’;
if(preg_match($pattern, $st, $match)){
array_push($ar, $match[1]);
}
}

echo “

”;

print_r($ar);

echo “
”;
[/php]

Outputs:

Array ( [0] => 123 [1] => 12a [2] => 12-34 [3] => 1 )
#6

thanks a lot! i almost got it right now.

i changed it into:
[php]<?php
//Enter your code here, enjoy!
$str= ‘t.st test 12-23s’;

$pattern = '/(\d{0,4}\s?-?\w{0,2})$/';
if(preg_match($pattern, $str, $match)){
	echo trim(str_replace($match[0], "", $str)) . "\n";
	$pattern2 = '/[a-zA-Z]$/';
	if (preg_match($pattern2, $match[1], $test)){
		echo trim(str_replace($test[0], "", $match[1])) . "\n";
		echo $test[0] . "\n";
	} else {
	    echo  $match[1] . "\n";
	}
}[/php]

the only problem is that the 2nd echo should be 12-23 and the first should not end with 12-.

could you help me solve that properly pls?

#7

This may be more workable then,
[php]$str = ‘t.st test 12-23s’;

$pattern = ‘/(\d{0,4}\s?-?\d{0,4})\w$/’;

if (preg_match ( $pattern, $str, $match )) {
print_r( $match);

}[/php]

#8

Or just use explode() function and take the last entry…

$str = ‘t.st test 12-23s’;
$results = end(explode(" ", $str));

#9

thanks a lot guys. i used this:
[php]$str= ‘t.st test 12-14a’;

$pattern = '/(\d{0,4}\s?-?\d{0,4})\w$/';
if(preg_match($pattern, $str, $match)){
	echo trim(str_replace($match[0], "", $str)) . "\n";
	$pattern2 = '/[a-zA-Z]$/';
	if (preg_match($pattern2, $match[0], $test)){
		echo trim(str_replace($test[0], "", $match[0])) . "\n";
		echo $test[0] . "\n";
	} else {
	    echo  $match[0] . "\n";
	}
}[/php]
#10

Wow, lots of code instead of the one line I gave you…

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