Asked  7 Months ago    Answers:  5   Viewed   31 times

What is the best way to get the first 5 words of a string? How can I split the string into two in such a way that first substring has the first 5 words of the original string and the second substring constitutes the rest of the original string


$pieces = explode(" ", $inputstring);
$first_part = implode(" ", array_splice($pieces, 0, 5));
$other_part = implode(" ", array_splice($pieces, 5));

explode breaks the original string into an array of words, array_splice lets you get certain ranges of those words, and then implode combines the ranges back together into single strings.

Wednesday, March 31, 2021
answered 7 Months ago
select a.*
from Tablename a
   select count(*) 
   from Tablename as b
   where = and >=
) <= 2
  • SQLFiddle Demo
Wednesday, March 31, 2021
answered 7 Months ago

A regex would be simplest:

$input = 'foo_left.jpg';
if(!preg_match('/_(left|right|center)/', $input, $matches)) {
    // no match

$pos = $matches[0]; // "_left", "_right" or "_center"

See it in action.


For a more defensive-minded approach (if there might be multiple instances of "_left" and friends in the filename), you can consider adding to the regex.

This will match only if the l/r/c is followed by a dot:

preg_match('/(_(left|right|center))./', $input, $matches);

This will match only if the l/r/c is followed by the last dot in the filename (which practically means that the base name ends with the l/r/c specification):

preg_match('/(_(left|right|center))\.[^\.]*$/', $input, $matches);

And so on.

If using these regexes, you will find the result in $matches[1] instead of $matches[0].

Wednesday, March 31, 2021
answered 7 Months ago

Performance wise substring(0, 1) is better as found by following:

    String example = "something";
    String firstLetter  = "";

    long l=System.nanoTime();
    firstLetter = String.valueOf(example.charAt(0));
    System.out.println("String.valueOf: "+ (System.nanoTime()-l));

    firstLetter = Character.toString(example.charAt(0));
    System.out.println("Character.toString: "+ (System.nanoTime()-l));

    firstLetter = example.substring(0, 1);
    System.out.println("substring: "+ (System.nanoTime()-l));


String.valueOf: 38553
Character.toString: 30451
substring: 8660
Wednesday, July 28, 2021
answered 3 Months ago

This can't work properly. Stored with Unicode there are many more Characters than with ANSI. So if you "convert" to ANSI, you will loose lots of charackters.

You can use Unicode (UTF-8) charset with htmlentities:

string htmlentities ( string $string [, int $flags = ENT_COMPAT [, string $charset [, bool $double_encode = true ]]] )

htmlentities($myString, ENT_COMPAT, "UTF-8"); should work.

Thursday, August 5, 2021
answered 3 Months ago
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