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18 sie 2013 · function byte_format($size) { $bytes = array( ' KB', ' MB', ' GB', ' TB' ); foreach ($bytes as $val) { if (1024 <= $size) { $size = $size / 1024; continue; } break; } return round( $size, 1 ) . $val; }
PHP's strlen function behaves differently than the C strlen function in terms of its handling of null bytes ('\0'). In PHP, a null byte in a string does NOT count as the end of the string, and any null bytes are included in the length of the string.
27 wrz 2011 · Byte size is measured with strlen(), whereas string length is queried using mb_strlen(). You can use substr() to trim a string to X bytes (note that this will break the string if it has a multi-byte encoding - as pointed out by Darhazer in the comments) and mb_substr() to trim it to X characters in the encoding of the string.
strlen() returns the number of bytes rather than the number of characters in a string.
Use the PHP strlen () function to get the number of bytes of a string. Use the PHP mb_strlen () function to get the number of characters in a string with a specific encoding.
10 sty 2024 · A more reliable way to determine the byte length of a string in PHP is to use the mb_strlen() function while explicitly specifying the encoding.
strlen returns the number of bytes rather than the number of characters in a string. Note: strlen returns null when executed on arrays, and an E_WARNING level error is emitted. Related Functions. count - Counts all elements in an array or in a Countable object. grapheme_strlen - Get string length in grapheme units.
