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<?php $filteredZips='[ { "id": 21, "distance": "0" }, { "id": 20, "distance": "3.9399923305414037" }, { "id": 29, "distance": "8.33045537474091" } ]'; $filteredZipsarr = json_decode($filteredZips,true); $id = array_column($filteredZipsarr, "id"); Var_dump($id);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array(3) { [0]=> int(21) [1]=> int(20) [2]=> int(29) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(3) { [0]=> int(21) [1]=> int(20) [2]=> int(29) }

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