v1.7.15-202004301145

¤ PHP 7.4 curly brace substring compatibility
¤ add basic support for WebP

• [bugfix: G18] fopen() fails when using remote images from SSL
• [bugfix: G65] ImageMagick -flatten vs PNG transparency
• [bugfix: G75] improved InitializeTempDirSetting
• [bugfix: G76] fix memory limit detection
• [bugfix: G78] AllowOutputEnlargement and Zoom-Crop
• [bugfix: G90] missing $PHPTHUMB_CONFIG
• [bugfix: G91] missing config_ prefix in allow_local_http_src
• [bugfix: G93] ImageMagick unsharp amount/threshold
• [bugfix: G94] cannot declare class phpthumb_functions
• [bugfix: G96] language level migration fixes
• [bugfix: G108] add 'line-height' for text in image
• [bugfix: G113] fix PNGs losing transparency
• [bugfix: G123] improved default thumbnail filename
• [bugfix: G126] overlay on transparent image
• [bugfix: G133] fix 'wmi' and 'wmt' filters
• [bugfix: G134] fix fsockopen http status text
• [bugfix: G140] parse_url return user/pass
• [bugfix: G142] allow transparent background when using 'far'
• [bugfix: G144] fix class_exists
• [bugfix: G149] magic quotes deprecated in PHP 7.4.2
• bugfix: ImageMagick v7+ parameter order (in, op, out)