This page is for anyone writing expressions, macros or scripts in which you need to escape special characters.
When writing expressions , macros or scripts you may need to enter a character that has special meaning. For example, a string could include a double-quote, but in the expression PhixFlow will read this as the end of the string. To tell PhixFlow to ignore a special character, you can use the backslash character.
...
| Code Block |
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do(
$value = $args[1],
$value = replaceAll( $value , "\b","\\\\b"),
$value = replaceAll( $value , "\f","\\\\f"),
$value = replaceAll( $value , "\t","\\\\t"),
$value = replaceAll( $value , "\r","\\\\r"),
$value = replaceAll( $value , "\n","\\\\n"),
$value = replaceAll( $value , "\\\\","\\\\\\\\"),
$value = replaceAll( $value , '"','\\\\"')
)
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Validating Data Imported Into PhixFlow
JSON data (like any imported data format) can include characters that cannot be written to a database that is using the UTF-8 character set. For example, 4-bit Emojis are not supported by UTF-8.
The following regular expression lists the characters expected in a JSON file and removes invalid characters from it.
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replaceAll(JSON Code,"[^\\p{Space}0-9A-Za-z!:\\\"%&\\[*()\\],-/_\\\\{}\\.]","") |
The backslash character escapes special characters such as [] , . and \
| Tip |
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Check which database PhixFlow is running on to see how it handles 4-bit characters. An oracle database with the recommended configuration can store the full range of Uni-code characters whilst MySQL/MariaDB UFT-8mb3 databases cannot and invalid characters will need to be removed before writing to the database. See ; see Database for recommended database configurations. |