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uphp:functions:file_exists
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uphp:functions:file_exists [2017/04/10 12:38] jeff |
uphp:functions:file_exists [2021/09/13 05:57] |
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| - | ======file_exists====== | ||
| - | |||
| - | < | ||
| - | |||
| - | Check if a file exists | ||
| - | |||
| - | ====Description==== | ||
| - | |||
| - | <well size=" | ||
| - | < | ||
| - | <span style=" | ||
| - | <span style=" | ||
| - | </ | ||
| - | [[file_exists]] ( | ||
| - | < | ||
| - | <span style=" | ||
| - | <span style=" | ||
| - | <span style=" | ||
| - | </ | ||
| - | </ | ||
| - | |||
| - | Return 1 (true) if the file exists, otherwise return 0 (false) | ||
| - | |||
| - | ====Parameter==== | ||
| - | |||
| - | < | ||
| - | |||
| - | ====Return Value==== | ||
| - | |||
| - | < | ||
| - | |||
| - | ====Examples==== | ||
| - | |||
| - | **Simple existence report:** | ||
| - | |||
| - | <code php> | ||
| - | < | ||
| - | if (file_exists("/ | ||
| - | print(" | ||
| - | } else { | ||
| - | print(" | ||
| - | } | ||
| - | ?></ | ||
| - | </ | ||
| - | |||
| - | **Create a new file with a unique non-conflicting filename** - this example is extracted from the Wattmon OS "/ | ||
| - | |||
| - | <code php> | ||
| - | <? | ||
| - | $date=strftime("/ | ||
| - | $cnt=0; | ||
| - | while (file_exists($date)) { | ||
| - | $date=strftime("/ | ||
| - | $cnt++; | ||
| - | } | ||
| - | $st="/ | ||
| - | if (file_exists($st)) { | ||
| - | $res=rename($st, | ||
| - | if ($res==0) $_GLOBALS[' | ||
| - | log(" | ||
| - | } else { | ||
| - | $_GLOBALS[' | ||
| - | } | ||
| - | print(" | ||
| - | ?> | ||
| - | </ | ||
| - | |||
| - | ====See Also==== | ||
| - | |||
| - | [[findfirst()]] - Start searching the current folder for files matching a pattern and attributes | ||
| - | |||
| - | [[strftime()]] - Format the passed time using the format < | ||
| - | |||
| - | [[time()]] - Return the current system timestamp | ||
| - | |||
| - | [[rename()]] - Rename or move a file from source to destination | ||
| - | |||
| - | [[log()]] - Print to the System Log | ||
| - | |||
| - | [[uphp: | ||
uphp/functions/file_exists.txt · Last modified: 2021/09/13 05:57 (external edit)
