Online PHP editor | perf for HHYIQ

<?php function munge( $s ) { $segments = preg_split( '/([{}])/', $s, -1, PREG_SPLIT_DELIM_CAPTURE ); $level = 0; for ( $i = 0, $len = count( $segments ); $i < $len; $i++ ) { if ( $level === 0 && str_starts_with( $segments[$i], 'O:10:"DatePeriod":' ) ) { $level = 1; $dp_header_index = $i; $i++; // consume opening '{' of DatePeriod object $has_include_end_date = false; } elseif ( $level ) { if ( $segments[$i] === '{' ) { $level++; } elseif ( $segments[$i] === '}' ) { $level--; if ( !$level ) { // end of DatePeriod object if( !$has_include_end_date ) { // append 'include_end_date' property $segments[$i] = 's:16:"include_end_date";b:0;}'; // adjust object header $dp_header = $segments[$dp_header_index]; $dp_header_parts = explode( ':', $dp_header ); // 'O', class name length, class name, # of props $dp_header_parts[3] += 1; $dp_header = implode( ':', $dp_header_parts ); $segments[$dp_header_index] = $dp_header; } } } elseif ( $level === 1 ) { if ( preg_match( '/(^|;)s:16:"include_end_date";b:/', $segments[$i] ) ) { // serialization was generated in PHP 8.2+ $has_include_end_date = true; } } else { // Nested object inside DatePeriod, ignore. A DatePeriod can't contain another DatePeriod. } } } return implode( $segments ); } $php81_dp = 'O:10:"DatePeriod":6:{s:5:"start";O:8:"DateTime":3:{s:4:"date";s:26:"2025-10-15 16:50:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";N;s:8:"interval";O:12:"DateInterval":16:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:1;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:7:"weekday";i:0;s:16:"weekday_behavior";i:0;s:17:"first_last_day_of";i:0;s:6:"invert";i:0;s:4:"days";b:0;s:12:"special_type";i:0;s:14:"special_amount";i:0;s:21:"have_weekday_relative";i:0;s:21:"have_special_relative";i:0;}s:11:"recurrences";i:4;s:18:"include_start_date";b:1;}'; $php83_dp = 'O:10:"DatePeriod":7:{s:5:"start";O:8:"DateTime":3:{s:4:"date";s:26:"2025-10-15 16:50:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:16:"Europe/Amsterdam";}s:7:"current";N;s:3:"end";N;s:8:"interval";O:12:"DateInterval":10:{s:1:"y";i:0;s:1:"m";i:0;s:1:"d";i:1;s:1:"h";i:0;s:1:"i";i:0;s:1:"s";i:0;s:1:"f";d:0;s:6:"invert";i:0;s:4:"days";b:0;s:11:"from_string";b:0;}s:11:"recurrences";i:4;s:18:"include_start_date";b:1;s:16:"include_end_date";b:0;}'; var_dump( munge( $php81_dp ) ); var_dump( munge( $php83_dp ) ); var_dump( unserialize( munge( $php81_dp ) ) ); var_dump( unserialize( munge( $php83_dp ) ) );

Version	System time (s)	User time (s)	Memory (MiB)
8.5.3	0.011	0.007	17.97
8.5.2	0.008	0.011	20.27
8.5.1	0.012	0.007	17.44
8.5.0	0.012	0.011	23.19
8.4.18	0.015	0.008	20.32
8.4.17	0.010	0.013	23.97
8.4.16	0.012	0.012	24.03
8.4.15	0.002	0.000	14.05
8.4.14	0.004	0.006	18.27
8.4.13	0.012	0.009	20.03
8.4.12	0.015	0.007	20.50
8.4.9	0.014	0.008	20.08
8.3.30	0.015	0.006	19.58
8.3.29	0.017	0.006	19.04
8.3.28	0.012	0.009	19.04
8.3.27	0.012	0.011	17.36
8.3.26	0.013	0.008	17.35
8.3.25	0.014	0.007	19.12
8.3.18	0.013	0.009	19.01
8.3.5	0.013	0.007	18.57
8.2.30	0.014	0.010	18.69
8.1.34	0.014	0.009	20.18