function Scanner::charAt

Return the character at the given index in the source code or null if the end is reached.

Parameters

int $index Index, if not given it will use the current index:

Return value

string|null

13 calls to Scanner::charAt()

Scanner::consumeExponentPart in vendor/mck89/peast/lib/Peast/Syntax/Scanner.php

Consumes the exponent part of a number

Scanner::consumeNumbers in vendor/mck89/peast/lib/Peast/Syntax/Scanner.php

Consumes the maximum number of digits

Scanner::consumeUnicodeEscapeSequence in vendor/mck89/peast/lib/Peast/Syntax/Scanner.php

Consumes an unicode escape sequence

Scanner::consumeUntil in vendor/mck89/peast/lib/Peast/Syntax/Scanner.php

Consumes characters until one of the given characters is found

Scanner::error in vendor/mck89/peast/lib/Peast/Syntax/Scanner.php

Throws a syntax error

... See full list

File

vendor/mck89/peast/lib/Peast/Syntax/Scanner.php, line 633

Class

Scanner

Base class for scanners.

Namespace

Peast\Syntax

Code

public function charAt($index = null) {
    if ($index === null) {
        $index = $this->index;
    }
    return $index < $this->length ? $this->source[$index] : null;
}