PHP如何正确读取JSON记录并提取所有text字段值合并输出

问题原因 #

你的现有代码在遍历每一个text字段时，都会即时生成独立的JSON结构并输出，所以最终会得到多个分离的message对象，没有实现全局的文本拼接。

修复思路 #

1. 遍历JSON前先初始化一个空字符串变量，用于累计所有提取到的text内容
2. 遍历过程中仅向该变量追加文本内容，不生成、输出JSON结构
3. 所有内容遍历完成后，再将拼接好的完整文本放入message字段，一次性输出JSON

修改后的完整代码 #

$spacing = " ";
$output = '
    {
        "language": "en",
        "textAngle": 0.0,
        "orientation": "Up",
        "regions": [{
                "boundingBox": "236,480,851,2269",
                "lines": [{
                        "boundingBox": "646,480,441,115",
                        "words": [{
                            "boundingBox": "646,480,441,115",
                            "text": "Cont050"
                        }]
                    },

                    {
                        "boundingBox": "308,576,198,106",
                        "words": [{
                            "boundingBox": "308,576,198,106",
                            "text": "Contoso"
                        }]
                    },
                    {
                        "boundingBox": "301,683,386,137",
                        "words": [{
                                "boundingBox": "301,683,80,75",
                                "text": "123"
                            },
                            {
                                "boundingBox": "403,706,115,86",
                                "text": "Main"
                            },
                            {
                                "boundingBox": "538,744,149,76",
                                "text": "street"
                            }
                        ]
                    },
                    {
                        "boundingBox": "293,792,521,125",
                        "words": [{
                                "boundingBox": "293,792,255,120",
                                "text": "Redmond,"
                            },
                            {
                                "boundingBox": "564,849,77,66",
                                "text": "WA"
                            },
                            {
                                "boundingBox": "661,859,153,58",
                                "text": "98052"
                            }
                        ]
                    },
                    {
                        "boundingBox": "278,1009,367,106",
                        "words": [{
                            "boundingBox": "278,1009,367,106",
                            "text": "987454-3210"
                        }]
                    },
                    {
                        "boundingBox": "265,1231,257,92",
                        "words": [{
                            "boundingBox": "265,1231,257,92",
                            "text": "6/10/2019"
                        }]
                    },
                    {
                        "boundingBox": "259,1352,596,92",
                        "words": [{
                                "boundingBox": "259,1352,155,73",
                                "text": "Sales"
                            },
                            {
                                "boundingBox": "434,1368,275,76",
                                "text": "Associate:"
                            }, {
                                "boundingBox": "732,1380,123,63",
                                "text": "Paul"
                            }
                        ]
                    },
                    {
                        "boundingBox": "249,1587,18,69",
                        "words": [{
                            "boundingBox": "249,1587,18,69",
                            "text": "1"
                        }]
                    },
                    {
                        "boundingBox": "326,1591,327,92",
                        "words": [{
                            "boundingBox": "326,1591,327,92",
                            "text": "Cappuccino"
                        }]
                    },
                    {
                        "boundingBox": "236,1842,498,75",
                        "words": [{
                                "boundingBox": "236,1842,19,73",
                                "text": "I"
                            },
                            {
                                "boundingBox": "315,1843,190,73",
                                "text": "BACON"
                            }, {
                                "boundingBox": "529,1847,39,69",
                                "text": "&"
                            },
                            {
                                "boundingBox": "593,1847,141,70",
                                "text": "EGGS"
                            }
                        ]
                    }, {
                        "boundingBox": "350,1978,393,82",
                        "words": [{
                            "boundingBox": "350,1978,393,82",
                            "text": "Sunny-side-up"
                        }]
                    },
                    {
                        "boundingBox": "445,2371,113,88",
                        "words": [{
                            "boundingBox": "445,2371,113,88",
                            "text": "Tax"
                        }]
                    },
                    {
                        "boundingBox": "437,2644,166,105",
                        "words": [{
                            "boundingBox": "437,2644,166,105",
                            "text": "Total"
                        }]
                    }
                ]
            },
            {
                "boundingBox": "1113,1580,153,465",
                "lines": [{
                    "boundingBox": "1113,1580,153,84",
                    "words": [{
                        "boundingBox": "1113,1580,153,84",
                        "text": "$220"
                    }]
                }, {
                    "boundingBox": "1139,1954,122,91",
                    "words": [{
                        "boundingBox": "1139,1954,122,91",
                        "text": "9.5"
                    }]
                }]
            }
        ],
        "modelVersion": "2021-04-01"
    }
    ';

$json = json_decode($output, true);
// 初始化空字符串存储所有拼接的文本
$fullMessage = '';

foreach ($json['regions'] as $row1) {
    foreach ($row1['lines'] as $row2) {
        foreach ($row2['words'] as $row3) {
            // 追加当前text和分隔空格，去掉了原代码多余的点号
            $fullMessage .= $row3['text'] . $spacing;
        }
    }
}

// 所有内容拼接完成后统一生成JSON输出
// 如果不需要末尾多余空格，可以替换为trim($fullMessage)
$output_response = array(
    "message" => $fullMessage
);
echo json_encode($output_response);

核心修改点 #

• 新增了全局拼接变量$fullMessage，用于累计所有提取到的文本内容
• 删除了循环内部的JSON生成和输出逻辑，仅做文本追加
• 去掉了原代码中多余的点号，避免输出出现不必要的标点
• 所有遍历完成后统一生成JSON结构一次性输出

内容的提问来源于stack exchange，提问作者Nancy Moore