Hi how can we sort this: 
$arr = [
          '1 - foo - xxx',          
          '5 - foo - abc',          
          '4 - foo - efg',          
          '2 - foo - atc',          
          '3 - foo - ggg',          
          '1 - bar - aaa',          
          '2 - bar - ttt',          
          '3 - bar - xxx',          
          '5 - bar - akk',          
          '4 - bar - jjg',          
          '1 - bar - atc',          
          '2 - bar - yyg',          
          '5 - bar - gga',          
          '3 - bar - ttt',          
          '4 - bar - gag'
        ];

[download]
Into this: 
$sortedar = [
          '1 - foo - xxx',          
          '2 - foo - atc',          
          '3 - foo - ggg',          
          '4 - foo - efg',          
          '5 - foo - abc',          
          '1 - bar - aaa',          
          '2 - bar - ttt',          
          '3 - bar - xxx',          
          '4 - bar - jjg',          
          '5 - bar - akk',          
          '1 - bar - atc',          
          '2 - bar - yyg',          
          '3 - bar - ttt',          
          '4 - bar - gag'
          '5 - bar - gga',          
        ];

[download]
So $arr is sorted on the basis of it's numerical value series (1,2,3,4,..N). In this case N=5, and N can be anything.

In reply to How to Sort Numerical String by Anonymous Monk

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