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7.5.20. isIdentifier() - 7.5.19. isFunction()
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7.5.20. isIdentifier()
| Reference | bool isIdentifier(string $id) |
|---|
Returns true, if the specified $id is a valid identifier:
- The first character is a letter or underscore.
- The next characters are letters, digits or underscore.
- 7.5.20. isIdentifier()
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7.5.21. isInstruction()