PHP Decode

<?php

return [
    'regex' => [ // 
        '/`This is a \$\{([a-zA-Z]+)\} variable\.`/s' => '` ${$1} .`',
        '/______/s' => '______',
        '/______/s' => '______',
    ],
    [ // 
        '`This is a ${a} variable.`' => '` ${a} .`',
        '______' => '______',
        '______' => '______',
    ],
    [ // 
        "`This is a \${a} variable.`" => "` \${a} .`",
        "______" => "______",
        "______" => "______",
    ],
    [ // 
        'title:"Name"' => 'title:""',
        '______' => '______',
        '______' => '______',
    ],
    [ // 
        "title:'Name'" => "title:''",
        "______" => "______",
        "______" => "______",
    ],
    [ // 
        "'This is a variable.'" => "'.'",
        "'______'" => "'______'",
        "'______'" => "'______'",
    ],
    [ // 
        '"This is a variable."' => '"."',
        '"______"' => '"______"',
        '"______"' => '"______"',
    ],
    //  []
    // ...
];

# 
// ([a-zA-Z]+)
// ([a-zA-Z_\.]+)
// ([a-zA-Z\d_\.]+)
// ([\da-zA-Z_\(\)\[\]\.]+)
// ([\da-zA-Z_\(\)\[\]\.,"]+)
// ([\da-zA-Z_\(\)\[\]\.,"\|]+)
// ([\da-zA-Z_\(\)\-\+\[\]\.,":&\|\s\?<>=]+)

// ({collection:"",folder:""})
// ({collection:"",environment:""})
// ({collection:"",folder:"",request:""})
// ({collection:"","environment":"",globals:""})
// ({collection:"","mock server":"",environment:""})
// ({globals:"",collection:"",environment:"",folder:"",request:""})

// '"(.*)"' => '"(.*)"'

// ([A-Za-z]+)([\u4e00-\u9fa5]+) $1 $2
// ([\u4e00-\u9fa5]+)([A-Za-z]+) $1 $2
// (,)([\u4e00-\u9fa5]+) $1 $2

// '`([A-Za-z\s,\\']+)?\$\{([\da-zA-Z_\(\)\-\+\[\]\.,":&\|\s]+)\}([A-Za-z\s,\\']+)?`' => '`(.*)?\$\{([\da-zA-Z_\(\)\-\+\[\]\.,":&\|\s]+)\}(.*)?`',
// '/`$1\\\$\\{([\\da-zA-Z_\\(\\)\\-\\+\\[\\]\\.,":&\\|\\s]+)\\}$3`/s' => '`$4\${\$1}$6`',