如何使用 PHP 转换 JSON 数据中的十六进制代码

here are two full samples of the json that are failing validation

{ "results": [ { "link": "http://dev.careersatnmc.org/content/clinical-information-clerk-patient-financial-services-11-12", "type": "", "title": "Clinical Information Clerk, Patient Financial Services, #11-12", "user": "", "date": "1337699702", "node": "", "extra": "", "score": 1.9532660466727E+25, "snippet": "... 
 Proficient knowledge of x3cstrongx3emedicalx3c/strongx3e terminology; typing skills at 40 wpm. Excellent communication and ... which involves access to sensitive and/or confidential x3cstrongx3emedicalx3c/strongx3e information. Must demonstrate leadership skills in decision making and ..." }, { "link": "http://dev.careersatnmc.org/content/medical-assistant-northwestern-walk-clinic-11-44", "type": "", "title": "Medical Assistant, Northwestern Walk-In Clinic, #11-44", "user": "", "date": "1334178982", "node": "", "extra": "", "score": 1.6696042412062E+25, "snippet": "... 
 Yes 
 
 
 The x3cstrongx3eMedicalx3c/strongx3e Assistant performs patient screening care under the direction of the x3cstrongx3eMedicalx3c/strongx3e Director/On-site provider including, but not limited to, EKG’s. ..." }, { "link": "http://dev.careersatnmc.org/nursing-jobs", "type": "", "title": "Nursing Opportunities at Northwestern", "user": "", "date": "1333132723", "node": "", "extra": "", "score": 1.5935361158907E+25, "snippet": "... environment for caregivers. Here at Northwestern x3cstrongx3eMedicalx3c/strongx3e Center, in addition to being a destination of choice for patients, we ..." }, { "link": "http://dev.careersatnmc.org/nursing-careers/rn/registered-nurse-float-pool-11-106", "type": "", "title": "Registered Nurse, Float Pool #11-106 ", "user": "", "date": "1333040298", "node": "", "extra": "", "score": 1.5869853268872E+25, "snippet": "... safe nursing care in a timely manner to patients on the x3cstrongx3eMedicalx3c/strongx3e Surgical Unit and Intensive Care Units with a high degree of ... Float Pool RN will be required to rotate to both ICU and x3cstrongx3eMedicalx3c/strongx3e Surgical Units based on patient census and staffing need. These ..." }, { "link": "http://dev.careersatnmc.org/content/medical-assistant-northwestern-walk-clinic-11-68", "type": "", "title": "Medical Assistant, Northwestern Walk-In Clinic, #11-68", "user": "", "date": "1327941682", "node": "", "extra": "", "score": 1.2643954777586E+25, "snippet": "... 
 Yes 
 
 
 The x3cstrongx3eMedicalx3c/strongx3e Assistant performs patient screening care under the direction of the x3cstrongx3eMedicalx3c/strongx3e Director/On-site provider including, but not limited to, EKG’s. ..." }, { "link": "http://dev.careersatnmc.org/content/clinical-support-associate-diagnostic-imaging-10-126", "type": "", "title": "Clinical Support Associate, Diagnostic Imaging, #10-126", "user": "", "date": "1327936594", "node": "", "extra": "", "score": 1.2641087846662E+25, "snippet": "... 
 Three years experience in a x3cstrongx3emedicalx3c/strongx3e office required. Prior clerical work experience in a x3cstrongx3emedicalx3c/strongx3e office, knowledge of x3cstrongx3emedicalx3c/strongx3e terminology, typing skills required. ..." }, { "link": "http://dev.careersatnmc.org/content/licensed-practical-nurse-cardiology-11-61", "type": "", "title": "Licensed Practical Nurse, Cardiology, #11-61", "user": "", "date": "1327443988", "node": "", "extra": "", "score": 1.2366575548271E+25, "snippet": "... 
 Previous experience with electronic x3cstrongx3emedicalx3c/strongx3e records preferred. 
 
 
 
 Special Skills / ..." }, { "link": "http://dev.careersatnmc.org/equal-opportunity-policy", "type": "", "title": "Equal Opportunity", "user": "", "date": "1319564835", "node": "", "extra": "", "score": 8.704398538793E+24, "snippet": " Northwestern x3cstrongx3eMedicalx3c/strongx3e Center is an equal opportunity employer that is committed to fair and ..." }, { "link": "http://dev.careersatnmc.org/NMC-Hospital-Video", "type": "", "title": "NMC Hospital Video", "user": "", "date": "1317216552", "node": "", "extra": "", "score": 7.8394368227485E+24, "snippet": "... more about what itx26#39;s like to work at Northwestern x3cstrongx3eMedicalx3c/strongx3e Center from some of the hospitalx26#39;s providers. x26nbsp; 
 
 ..." }, { "link": "http://dev.careersatnmc.org/overview", "type": "", "title": "About NMC", "user": "", "date": "1305051468", "node": "", "extra": "", "score": 4.5584239764666E+24, "snippet": "... environment for caregivers.x26nbsp; Here at Northwestern x3cstrongx3eMedicalx3c/strongx3e Center, in addition to being a destination of choice for patients, we ..." } ], "total": "36" }

{ "results": [ { "link": "http://dev.northwesternmedicalcenter.org/courtyard-cafe", "type": "", "title": "The Courtyard Café", "user": "", "date": "1341844260", "node": "", "extra": "", "score": 0.54264448532277, "snippet": " Meals u0026amp; Snacks 
 The NMC Courtyard Café serves a wide variety of options, whether you need a full meal or just a snack or drink.u0026nbsp; There are always healthy options available to choose from in the Courtyard Café during hours of operation. 
 T ..." }, { "link": "http://dev.northwesternmedicalcenter.org/overview", "type": "", "title": "Welcome to Northwestern Medical Center!", "user": "", "date": "1308682802", "node": "", "extra": "", "score": 0.54083665338769, "snippet": " Northwestern u003cstrongu003eMedicalu003c/strongu003e Center is au0026nbsp;vibrant, not-for-profit, primary care hospital nestled ... we pride ourselves on bringing a broad range of high-tech u003cstrongu003emedicalu003c/strongu003e equipment u0026amp; services to our region. Thanks to that balance and the ..." }, { "link": "http://dev.northwesternmedicalcenter.org/stories-nmc", "type": "", "title": "Stories at NMC", "user": "", "date": "1340734687", "node": "", "extra": "", "score": 0.51676585442723, "snippet": "... Birth Center nurses and the IT folks at Northwestern u003cstrongu003eMedicalu003c/strongu003e Center, to experience the birth of his daughter Payton while on duty in ..." }, { "link": "http://dev.northwesternmedicalcenter.org/medical-executive-committee", "type": "", "title": "Medical Executive Committee", "user": "", "date": "1306856292", "node": "", "extra": "", "score": 0.41599960274235, "snippet": " u003cstrongu003eMedicalu003c/strongu003e Executive Committee 
 The NMC u003cstrongu003eMedicalu003c/strongu003e Staff is made up of more than 75 active staff physicians and more than 200 other physicians, dentists, and u003cstrongu003emedicalu003c/strongu003e providers who have privileges at the hospital.u0026nbsp; The u003cstrongu003eMedicalu003c/strongu003e Staff ..." }, { "link": "http://dev.northwesternmedicalcenter.org/medical-cardiology", "type": "", "title": "Medical Cardiology", "user": "", "date": "1327606268", "node": "", "extra": "", "score": 0.40720084861885, "snippet": " ..." }, { "link": "http://dev.northwesternmedicalcenter.org/news-and-updates/dr-lowrey-sullivan-named-chief-medical-officer", "type": "", "title": "Dr. Lowrey Sullivan Named Chief Medical Officer", "user": "", "date": "1326989520", "node": "", "extra": "", "score": 0.40509813494658, "snippet": "... that Dr. Sullivan has accepted the position of Chief u003cstrongu003eMedicalu003c/strongu003e Officer,u0026rdquo; said Jill Bowen, NMCu0026rsquo;s Chief Executive ... Having a physician who already has the respect of our u003cstrongu003emedicalu003c/strongu003e staff provides a strong foundation for the success of this ... his Bachelors degree from Middlebury College and his u003cstrongu003eMedicalu003c/strongu003e Degree from the University of Vermont.u0026nbsp; He did his Internship and ..." }, { "link": "http://dev.northwesternmedicalcenter.org/nmc.overview-video", "type": "", "title": "NMC Overview Video", "user": "", "date": "1327331110", "node": "", "extra": "", "score": 0.33907030714933, "snippet": " View the video below to learn more about St. Albanu0026rsquo;s lifestyle offerings. The city has much to offer and its central location between Burlington and Montreal makes it a great place to enjoy the pace and intimacy of a small town with access to bi ..." }, { "link": "http://dev.northwesternmedicalcenter.org/nmc-overview-video", "type": "", "title": "NMC Overview Video", "user": "", "date": "1327331316", "node": "", "extra": "", "score": 0.33905170147781, "snippet": " View the video below to learn more about St. Albanu0026rsquo;s lifestyle offerings. The city has much to offer and its central location between Burlington and Montreal makes it a great place to enjoy the pace and intimacy of a small town with access to bi ..." }, { "link": "http://dev.northwesternmedicalcenter.org/news-and-updates/test-story", "type": "", "title": "Test Story", "user": "", "date": "1326989380", "node": "", "extra": "", "score": 0.33538503005686, "snippet": " Story Details 
 Full Story:u0026nbsp; 
 
 
 Wolf cred veniam sunt. Nesciunt PBR four loko blog american apparel labore. Sint reprehenderit american apparel nihil, mcsweeneyu0026#39;s freegan voluptate velit al ..." }, { "link": "http://dev.northwesternmedicalcenter.org/news-and-updates/nmc-laboratory-featured-video", "type": "", "title": "NMC Laboratory Featured in a Video", "user": "", "date": "1326989494", "node": "", "extra": "", "score": 0.33522577107044, "snippet": " Story Details 
 Full Story:u0026nbsp; 
 
 
 This electronic approach, which is being used as a model throughout the state, is quicker, more efficient, more accurate, and less costly way of sharing informat ..." } ], "total": "236" }

推荐答案

x 通常代表十六进制，而u 代表unicode.您的问题与 Unicode 或 unicode 代码点无关.

function weird_answer_to_weird_question($string)
{
    return preg_replace_callback('#\\x([[:xdigit:]]{2})#ism', function($matches)
    {
        return chr(hexdec($matches[1]));
    },
    $string);
}