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Edit File : Stream.php \| Size : 6.89 KB
<?php declare(strict_types=1); namespace ZipStream; use Psr\Http\Message\StreamInterface; use RuntimeException; /** * Describes a data stream. * * Typically, an instance will wrap a PHP stream; this interface provides * a wrapper around the most common operations, including serialization of * the entire stream to a string. / class Stream implements StreamInterface { protected $stream; public function __construct($stream) { $this->stream = $stream; } /* * Closes the stream and any underlying resources. * * @return void / public function close(): void { if (is_resource($this->stream)) { fclose($this->stream); } $this->detach(); } /* * Separates any underlying resources from the stream. * * After the stream has been detached, the stream is in an unusable state. * * @return resource\|null Underlying PHP stream, if any / public function detach() { $result = $this->stream; $this->stream = null; return $result; } /* * Reads all data from the stream into a string, from the beginning to end. * * This method MUST attempt to seek to the beginning of the stream before * reading data and read the stream until the end is reached. * * Warning: This could attempt to load a large amount of data into memory. * * This method MUST NOT raise an exception in order to conform with PHP's * string casting operations. * * @see http://php.net/manual/en/language.oop5.magic.php#object.tostring * @return string / public function __toString(): string { try { $this->seek(0); } catch (\RuntimeException $e) {} return (string) stream_get_contents($this->stream); } /* * Seek to a position in the stream. * * @link http://www.php.net/manual/en/function.fseek.php * @param int $offset Stream offset * @param int $whence Specifies how the cursor position will be calculated * based on the seek offset. Valid values are identical to the built-in * PHP $whence values for `fseek()`. SEEK_SET: Set position equal to * offset bytes SEEK_CUR: Set position to current location plus offset * SEEK_END: Set position to end-of-stream plus offset. * @throws \RuntimeException on failure. / public function seek($offset, $whence = SEEK_SET): void { if (!$this->isSeekable()) { throw new RuntimeException; } if (fseek($this->stream, $offset, $whence) !== 0) { throw new RuntimeException; } } /* * Returns whether or not the stream is seekable. * * @return bool / public function isSeekable(): bool { return (bool)$this->getMetadata('seekable'); } /* * Get stream metadata as an associative array or retrieve a specific key. * * The keys returned are identical to the keys returned from PHP's * stream_get_meta_data() function. * * @link http://php.net/manual/en/function.stream-get-meta-data.php * @param string $key Specific metadata to retrieve. * @return array\|mixed\|null Returns an associative array if no key is * provided. Returns a specific key value if a key is provided and the * value is found, or null if the key is not found. / public function getMetadata($key = null) { $metadata = stream_get_meta_data($this->stream); return $key !== null ? @$metadata[$key] : $metadata; } /* * Get the size of the stream if known. * * @return int\|null Returns the size in bytes if known, or null if unknown. / public function getSize(): ?int { $stats = fstat($this->stream); return $stats['size']; } /* * Returns the current position of the file read/write pointer * * @return int Position of the file pointer * @throws \RuntimeException on error. / public function tell(): int { $position = ftell($this->stream); if ($position === false) { throw new RuntimeException; } return $position; } /* * Returns true if the stream is at the end of the stream. * * @return bool / public function eof(): bool { return feof($this->stream); } /* * Seek to the beginning of the stream. * * If the stream is not seekable, this method will raise an exception; * otherwise, it will perform a seek(0). * * @see seek() * @link http://www.php.net/manual/en/function.fseek.php * @throws \RuntimeException on failure. / public function rewind(): void { $this->seek(0); } /* * Write data to the stream. * * @param string $string The string that is to be written. * @return int Returns the number of bytes written to the stream. * @throws \RuntimeException on failure. / public function write($string): int { if (!$this->isWritable()) { throw new RuntimeException; } if (fwrite($this->stream, $string) === false) { throw new RuntimeException; } return \mb_strlen($string); } /* * Returns whether or not the stream is writable. * * @return bool / public function isWritable(): bool { return preg_match('/[waxc+]/', $this->getMetadata('mode')) === 1; } /* * Read data from the stream. * * @param int $length Read up to $length bytes from the object and return * them. Fewer than $length bytes may be returned if underlying stream * call returns fewer bytes. * @return string Returns the data read from the stream, or an empty string * if no bytes are available. * @throws \RuntimeException if an error occurs. / public function read($length): string { if (!$this->isReadable()) { throw new RuntimeException; } $result = fread($this->stream, $length); if ($result === false) { throw new RuntimeException; } return $result; } /* * Returns whether or not the stream is readable. * * @return bool / public function isReadable(): bool { return preg_match('/[r+]/', $this->getMetadata('mode')) === 1; } /* * Returns the remaining contents in a string * * @return string * @throws \RuntimeException if unable to read or an error occurs while * reading. */ public function getContents(): string { if (!$this->isReadable()) { throw new RuntimeException; } $result = stream_get_contents($this->stream); if ($result === false) { throw new RuntimeException; } return $result; } } Back

Edit File : Stream.php | Size : 6.89 KB

<?php
declare(strict_types=1);

namespace ZipStream;

use Psr\Http\Message\StreamInterface;
use RuntimeException;

/**
 * Describes a data stream.
 *
 * Typically, an instance will wrap a PHP stream; this interface provides
 * a wrapper around the most common operations, including serialization of
 * the entire stream to a string.
 */
class Stream implements StreamInterface
{
    protected $stream;

public function __construct($stream)
    {
        $this->stream = $stream;
    }

/**
     * Closes the stream and any underlying resources.
     *
     * @return void
     */
    public function close(): void
    {
        if (is_resource($this->stream)) {
            fclose($this->stream);
        }
        $this->detach();
    }

/**
     * Separates any underlying resources from the stream.
     *
     * After the stream has been detached, the stream is in an unusable state.
     *
     * @return resource|null Underlying PHP stream, if any
     */
    public function detach()
    {
        $result = $this->stream;
        $this->stream = null;
        return $result;
    }

/**
     * Reads all data from the stream into a string, from the beginning to end.
     *
     * This method MUST attempt to seek to the beginning of the stream before
     * reading data and read the stream until the end is reached.
     *
     * Warning: This could attempt to load a large amount of data into memory.
     *
     * This method MUST NOT raise an exception in order to conform with PHP's
     * string casting operations.
     *
     * @see http://php.net/manual/en/language.oop5.magic.php#object.tostring
     * @return string
     */
    public function __toString(): string
    {
        try {
            $this->seek(0);
        } catch (\RuntimeException $e) {}
        return (string) stream_get_contents($this->stream);
    }

/**
     * Seek to a position in the stream.
     *
     * @link http://www.php.net/manual/en/function.fseek.php
     * @param int $offset Stream offset
     * @param int $whence Specifies how the cursor position will be calculated
     *     based on the seek offset. Valid values are identical to the built-in
     *     PHP $whence values for `fseek()`.  SEEK_SET: Set position equal to
     *     offset bytes SEEK_CUR: Set position to current location plus offset
     *     SEEK_END: Set position to end-of-stream plus offset.
     * @throws \RuntimeException on failure.
     */
    public function seek($offset, $whence = SEEK_SET): void
    {
        if (!$this->isSeekable()) {
            throw new RuntimeException;
        }
        if (fseek($this->stream, $offset, $whence) !== 0) {
            throw new RuntimeException;
        }
    }

/**
     * Returns whether or not the stream is seekable.
     *
     * @return bool
     */
    public function isSeekable(): bool
    {
        return (bool)$this->getMetadata('seekable');
    }

/**
     * Get stream metadata as an associative array or retrieve a specific key.
     *
     * The keys returned are identical to the keys returned from PHP's
     * stream_get_meta_data() function.
     *
     * @link http://php.net/manual/en/function.stream-get-meta-data.php
     * @param string $key Specific metadata to retrieve.
     * @return array|mixed|null Returns an associative array if no key is
     *     provided. Returns a specific key value if a key is provided and the
     *     value is found, or null if the key is not found.
     */
    public function getMetadata($key = null)
    {
        $metadata = stream_get_meta_data($this->stream);
        return $key !== null ? @$metadata[$key] : $metadata;
    }

/**
     * Get the size of the stream if known.
     *
     * @return int|null Returns the size in bytes if known, or null if unknown.
     */
    public function getSize(): ?int
    {
        $stats = fstat($this->stream);
        return $stats['size'];
    }

/**
     * Returns the current position of the file read/write pointer
     *
     * @return int Position of the file pointer
     * @throws \RuntimeException on error.
     */
    public function tell(): int
    {
        $position = ftell($this->stream);
        if ($position === false) {
            throw new RuntimeException;
        }
        return $position;
    }

/**
     * Returns true if the stream is at the end of the stream.
     *
     * @return bool
     */
    public function eof(): bool
    {
        return feof($this->stream);
    }

/**
     * Seek to the beginning of the stream.
     *
     * If the stream is not seekable, this method will raise an exception;
     * otherwise, it will perform a seek(0).
     *
     * @see seek()
     * @link http://www.php.net/manual/en/function.fseek.php
     * @throws \RuntimeException on failure.
     */
    public function rewind(): void
    {
        $this->seek(0);
    }

/**
     * Write data to the stream.
     *
     * @param string $string The string that is to be written.
     * @return int Returns the number of bytes written to the stream.
     * @throws \RuntimeException on failure.
     */
    public function write($string): int
    {
        if (!$this->isWritable()) {
            throw new RuntimeException;
        }
        if (fwrite($this->stream, $string) === false) {
            throw new RuntimeException;
        }
        return \mb_strlen($string);
    }

/**
     * Returns whether or not the stream is writable.
     *
     * @return bool
     */
    public function isWritable(): bool
    {
        return preg_match('/[waxc+]/', $this->getMetadata('mode')) === 1;
    }

/**
     * Read data from the stream.
     *
     * @param int $length Read up to $length bytes from the object and return
     *     them. Fewer than $length bytes may be returned if underlying stream
     *     call returns fewer bytes.
     * @return string Returns the data read from the stream, or an empty string
     *     if no bytes are available.
     * @throws \RuntimeException if an error occurs.
     */
    public function read($length): string
    {
        if (!$this->isReadable()) {
            throw new RuntimeException;
        }
        $result = fread($this->stream, $length);
        if ($result === false) {
            throw new RuntimeException;
        }
        return $result;
    }

/**
     * Returns whether or not the stream is readable.
     *
     * @return bool
     */
    public function isReadable(): bool
    {
        return preg_match('/[r+]/', $this->getMetadata('mode')) === 1;
    }

/**
     * Returns the remaining contents in a string
     *
     * @return string
     * @throws \RuntimeException if unable to read or an error occurs while
     *     reading.
     */
    public function getContents(): string
    {
        if (!$this->isReadable()) {
            throw new RuntimeException;
        }
        $result = stream_get_contents($this->stream);
        if ($result === false) {
            throw new RuntimeException;
        }
        return $result;
    }
}

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