3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $i=0;; while($i < 60000) { $i++; $data[md5($i)] = true; } $stime = microtime(true); array_key_exists('notexistingkey', $data); $time = microtime(true) - $stime; echo "Starting array_key_exists => $time\n"; $stime = microtime(true); isset($data['notexistingkey']); $time = microtime(true) - $stime; echo "Starting isset => $time\n";
Output for 7.0.4, 7.0.14 - 7.1.0
Starting array_key_exists => 9.5367431640625E-7 Starting isset => 9.5367431640625E-7
Output for 7.0.10
Starting array_key_exists => 1.1920928955078E-6 Starting isset => 0
Output for 7.0.1, 7.0.5, 7.0.9
Starting array_key_exists => 9.5367431640625E-7 Starting isset => 0
Output for 7.0.0, 7.0.8
Starting array_key_exists => 1.1920928955078E-6 Starting isset => 1.1920928955078E-6
Output for 7.0.7
Starting array_key_exists => 9.5367431640625E-7 Starting isset => 1.1920928955078E-6
Output for 5.6.10, 7.0.6
Starting array_key_exists => 2.1457672119141E-6 Starting isset => 9.5367431640625E-7
Output for 7.0.3
Starting array_key_exists => 1.1920928955078E-6 Starting isset => 9.5367431640625E-7
Output for 7.0.2
Starting array_key_exists => 1.9073486328125E-6 Starting isset => 0
Output for hhvm-3.12.0
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 1.0967254638672E-5
Output for hhvm-3.10.0
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 4.0531158447266E-6
Output for 5.2.2, 5.2.17, 5.3.9, 5.4.3, 5.4.9, 5.4.17, 5.4.19, 5.4.22, 5.4.27, 5.4.29, 5.4.32, 5.4.36, 5.4.42, 5.4.45, 5.5.9, 5.5.20, 5.6.6, 5.6.22, 5.6.28
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 9.5367431640625E-7
Output for 5.2.5, 5.3.16, 5.3.27, 5.4.5, 5.4.8, 5.4.14 - 5.4.15, 5.4.21, 5.4.30, 5.4.38, 5.4.40 - 5.4.41, 5.4.43, 5.5.1 - 5.5.2, 5.5.10, 5.5.13, 5.5.16, 5.5.27, 5.5.29, 5.6.5, 5.6.8, 5.6.17, 5.6.23, 5.6.25
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 9.5367431640625E-7
Output for 5.2.4, 5.6.24
Starting array_key_exists => 1.9073486328125E-6 Starting isset => 2.1457672119141E-6
Output for 5.2.15, 5.3.19, 5.4.24, 5.5.3, 5.6.15, 5.6.21
Starting array_key_exists => 3.814697265625E-6 Starting isset => 9.5367431640625E-7
Output for 5.2.11, 5.2.16, 5.3.23, 5.5.12, 5.5.22, 5.5.30, 5.6.0, 5.6.13, 5.6.20
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 1.1920928955078E-6
Output for 5.6.2, 5.6.9, 5.6.19
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 1.9073486328125E-6
Output for 5.2.7 - 5.2.8, 5.2.13, 5.3.0, 5.3.2, 5.3.7, 5.3.11, 5.3.17, 5.3.20, 5.3.25, 5.4.6 - 5.4.7, 5.4.23, 5.4.37, 5.5.4 - 5.5.5, 5.5.18 - 5.5.19, 5.5.23 - 5.5.24, 5.6.1, 5.6.11 - 5.6.12, 5.6.18
Starting array_key_exists => 4.0531158447266E-6 Starting isset => 9.5367431640625E-7
Output for 5.6.16
Starting array_key_exists => 1.9073486328125E-6 Starting isset => 1.1920928955078E-6
Output for 5.2.9, 5.3.1, 5.3.29, 5.4.2, 5.4.26, 5.4.44, 5.5.25, 5.5.31, 5.6.14
Starting array_key_exists => 4.0531158447266E-6 Starting isset => 1.9073486328125E-6
Output for 5.3.6, 5.4.25, 5.6.7
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 0
Output for 5.4.16, 5.4.18, 5.5.38, 5.6.3 - 5.6.4
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 1.1920928955078E-6
Output for 5.4.4, 5.4.13, 5.4.35, 5.5.37
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 1.9073486328125E-6
Output for 5.5.15, 5.5.36
Starting array_key_exists => 1.9073486328125E-6 Starting isset => 9.5367431640625E-7
Output for 5.2.3, 5.4.0, 5.4.34, 5.5.8, 5.5.14, 5.5.28, 5.5.35
Starting array_key_exists => 4.0531158447266E-6 Starting isset => 1.1920928955078E-6
Output for 5.3.4, 5.3.14, 5.3.21, 5.3.26, 5.5.0, 5.5.26, 5.5.33 - 5.5.34
Starting array_key_exists => 5.0067901611328E-6 Starting isset => 9.5367431640625E-7
Output for 5.3.5, 5.3.10, 5.5.7, 5.5.32
Starting array_key_exists => 3.814697265625E-6 Starting isset => 1.1920928955078E-6
Output for 5.2.6, 5.4.20, 5.5.11, 5.5.21
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 0
Output for 5.3.12, 5.3.22, 5.4.31, 5.5.6
Starting array_key_exists => 4.0531158447266E-6 Starting isset => 2.1457672119141E-6
Output for 5.4.12, 5.4.39
Starting array_key_exists => 3.0994415283203E-6 Starting isset => 2.1457672119141E-6
Output for 5.3.13, 5.4.28
Starting array_key_exists => 5.0067901611328E-6 Starting isset => 2.1457672119141E-6
Output for 5.4.11
Starting array_key_exists => 1.0013580322266E-5 Starting isset => 9.5367431640625E-7
Output for 5.4.10
Starting array_key_exists => 3.814697265625E-6 Starting isset => 2.1457672119141E-6
Output for 5.2.10, 5.2.14, 5.4.1
Starting array_key_exists => 3.814697265625E-6 Starting isset => 1.9073486328125E-6
Output for 5.3.28
Starting array_key_exists => 5.0067901611328E-6 Starting isset => 2.8610229492188E-6
Output for 5.3.3, 5.3.15, 5.3.18, 5.3.24
Starting array_key_exists => 5.0067901611328E-6 Starting isset => 1.9073486328125E-6
Output for 5.3.8
Starting array_key_exists => 6.1988830566406E-6 Starting isset => 1.9073486328125E-6
Output for 5.2.12
Starting array_key_exists => 2.8610229492188E-6 Starting isset => 2.1457672119141E-6
Output for 5.2.1
Starting array_key_exists => 2.1457672119141E-06 Starting isset => 0
Output for 5.2.0
Starting array_key_exists => 2.1457672119141E-06 Starting isset => 1.1920928955078E-06
Output for 5.1.4, 5.1.6
Starting array_key_exists => 2.8610229492188E-06 Starting isset => 9.5367431640625E-07
Output for 5.1.1 - 5.1.2, 5.1.5
Starting array_key_exists => 3.0994415283203E-06 Starting isset => 9.5367431640625E-07
Output for 5.1.3
Starting array_key_exists => 2.1457672119141E-06 Starting isset => 9.5367431640625E-07
Output for 5.1.0
Starting array_key_exists => 2.8610229492188E-06 Starting isset => 1.1920928955078E-06
Output for 5.0.5
Starting array_key_exists => 2.8610229492188E-06 Starting isset => 1.9073486328125E-06
Output for 5.0.4
Starting array_key_exists => 3.814697265625E-06 Starting isset => 1.9073486328125E-06
Output for 5.0.3
Starting array_key_exists => 4.0531158447266E-06 Starting isset => 1.9073486328125E-06
Output for 5.0.1 - 5.0.2
Starting array_key_exists => 3.0994415283203E-06 Starting isset => 2.1457672119141E-06
Output for 5.0.0
Starting array_key_exists => 4.0531158447266E-06 Starting isset => 2.1457672119141E-06
Output for 4.4.9
Starting array_key_exists => 1.5000000000015E-05 Starting isset => 2.000000000002E-06
Output for 4.4.8
Starting array_key_exists => 2.0999999999993E-05 Starting isset => 3.000000000003E-06
Output for 4.4.7
Starting array_key_exists => 1.5999999999988E-05 Starting isset => 3.000000000003E-06
Output for 4.4.6
Starting array_key_exists => 1.7000000000017E-05 Starting isset => 2.000000000002E-06
Output for 4.4.5
Starting array_key_exists => 2.9000000000001E-05 Starting isset => 3.000000000003E-06
Output for 4.4.4
Starting array_key_exists => 1.6000000000016E-05 Starting isset => 2.000000000002E-06
Output for 4.4.3
Starting array_key_exists => 1.8000000000018E-05 Starting isset => 2.000000000002E-06
Output for 4.4.2
Starting array_key_exists => 2.2999999999995E-05 Starting isset => 2.000000000002E-06
Output for 4.4.1
Starting array_key_exists => 1.4999999999987E-05 Starting isset => 2.000000000002E-06
Output for 4.4.0
Starting array_key_exists => 1.799999999999E-05 Starting isset => 1.9999999999742E-06
Output for 4.3.11
Starting array_key_exists => 2.3999999999996E-05 Starting isset => 3.000000000003E-06
Output for 4.3.10
Starting array_key_exists => 1.0999999999983E-05 Starting isset => 1.000000000001E-06
Output for 4.3.9
Starting array_key_exists => 1.1000000000011E-05 Starting isset => 2.000000000002E-06
Output for 4.3.8
Starting array_key_exists => 1.0999999999983E-05 Starting isset => 2.000000000002E-06
Output for 4.3.7
Starting array_key_exists => 1.1999999999998E-05 Starting isset => 2.9999999999891E-06
Output for 4.3.6
Starting array_key_exists => 1.3000000000013E-05 Starting isset => 2.000000000002E-06
Output for 4.3.5
Starting array_key_exists => 9.000000000009E-06 Starting isset => 1.000000000001E-06
Output for 4.3.4
Starting array_key_exists => 1.2000000000012E-05 Starting isset => 2.000000000002E-06
Output for 4.3.3
Starting array_key_exists => 1.4000000000014E-05 Starting isset => 2.000000000002E-06
Output for 4.3.2
Starting array_key_exists => 1.000000000001E-05 Starting isset => 2.000000000002E-06
Output for 4.3.1
Starting array_key_exists => 1.1999999999984E-05 Starting isset => 2.000000000002E-06
Output for 4.3.0
Starting array_key_exists => 1.2999999999985E-05 Starting isset => 3.000000000003E-06