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Editorial Team
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Asked: 2026-05-26T23:35:06+00:00

When storing an array in a file, I implode it with a delimiter, but

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When storing an array in a file, I implode it with a delimiter, but if any of the values had the delimiter in it, then this would destroy that value (and give me 2 smaller ones).

Is it good practice to use non-printable characters as a delimiter? And if so, how to do that?

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  1. Editorial Team

    It used to be a practice in the 80s. Specifically the ASCII charset had some non-printable symbols just for that very purpose.

       034   28    1C    FS  (file separator)        134   92    5C    \  '\\'
   035   29    1D    GS  (group separator)       135   93    5D    ]
   036   30    1E    RS  (record separator)      136   94    5E    ^
   037   31    1F    US  (unit separator)        137   95    5F    _

    You could use them like "\036" in PHP, and later split up by them. But JSON or phps serialize() format or even XML are more advisable for webapps than a binary format.

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