如何从html字符串php中提取json

这是我从youtube移动站点检索到的字符串。我想使用php提取json

$str = ")]}'{\"conn\": \"wifi\", \"content\": {\"pyv_ping_url\": null, \"subscription_state\": {\"subscribe_url\": {\"url\": \"\\\/channel_post?feature=watch\\u0026action_subscribe=1\", \"channel_id\": \"UCeQEKFH31vvD-InkTGSvCrA\"}, \"show_button\": true, \"is_subscribed\": false}, \"distiller_config\": {\"owner_id\": \"eQEKFH31vvD-InkTGSvCrA\", \"visible\": null, \"pinned_activity\": null, \"channel_id\": \"UCeQEKFH31vvD-InkTGSvCrA\", \"privacy_setting\": \"PUBLIC\", \"query\": \"http:\\\/\\\/www.youtube.com\\\/watch?v=C5tOEBmBAHg\", \"signin_url\": \"https:\\\/\\\/accounts.google.com\\\/ServiceLogin?service=youtube\\u0026passive=true\\u0026uilel=3\\u0026hl=en_US\\u0026ltmpl=mobile\\u0026continue=http%3A%2F%2Fm.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26feature%3Ddistiller%26hl%3Den_US%26next%3D%252Fwatch%253Fv%253DC5tOEBmBAHg%2526client%253Dmv-google%26nomobiletemp%3D1\", \"video_id\": \"C5tOEBmBAHg\", \"debug\": false, \"filter_premod\": false}, \"allow_comments\": true, \"ad_instream\": \"\", \"show_pyv_in_related\": false, \"player_data\":
   {\"fmt_stream_map\": [{\"itag\": \"18\", \"type\": \"video\\\/mp4; codecs=\\\"avc1.42001E, mp4a.40.2\\\"\", \"fallback_host\": \"tc.v6.cache1.c.youtube.com\", \"quality\": \"medium\", \"url\": \"http:\\\/\\\/r4---sn-nau-jhcl.c.youtube.com\\\/videoplayback?ms=au\\u0026itag=18\\u0026mt=1378896627\\u0026app=youtube_mobile\\u0026mv=m\\u0026source=youtube\\u0026sver=3\\u0026expire=1378918433\\u0026sparams=cp%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire\\u0026cp=U0hWTVlMVl9ITUNONl9RRlpFOkV6dktxMFVBYU1Y\\u0026upn=kjDilUW5IQE\\u0026ip=124.43.93.65\\u0026dnc=1\\u0026el=watch\\u0026yms=FcwHm3XWaNY\\u0026ratebypass=yes\\u0026key=yt1\\u0026signature=06D949BF71135F49A3BE9E7A47182B2A61DCF915.5B86FC625C760F1402BC700C660E61CC69684992\\u0026id=0b9b4e1019810078\\u0026fexp=907724%2C906942%2C924606%2C929117%2C929121%2C929906%2C929907%2C929922%2C929127%2C929129%2C929131%2C929930%2C936403%2C925726%2C936310%2C925720%2C925722%2C925718%2C925714%2C929917%2C906945%2C929933%2C920302%2C906842%2C913428%2C919811%2C913563%2C919373%2C930803%2C908536%2C938701%2C931924%2C936308%2C909549%2C900816%2C912711%2C904494%2C904497%2C939903%2C900375%2C900382%2C934507%2C907231%2C936312%2C906001\\u0026ipbits=8\"}, {\"itag\": \"36\", \"type\": \"video\\\/3gpp; codecs=\\\"mp4v.20.3, mp4a.40.2\\\"\", \"fallback_host\": \"tc.v23.cache2.c.youtube.com\", \"quality\": \"small\",
   \"url\": \"http:\\\/\\\/r4---sn-nau-jhcl.c.youtube.com\\\/videoplayback?ms=au\\u0026itag=36\\u0026mt=1378896627\\u0026app=youtube_mobile\\u0026mv=m\\u0026source=youtube\\u0026sver=3\\u0026expire=1378918433\\u0026sparams=cp%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire\\u0026cp=U0hWTVlMVl9ITUNONl9RRlpFOkV6dktxMFVBYU1Y\\u0026upn=kjDilUW5IQE\\u0026ip=124.43.93.65\\u0026dnc=1\\u0026el=watch\\u0026yms=FcwHm3XWaNY\\u0026ratebypass=yes\\u0026key=yt1\\u0026signature=663C16B74F22132913A4E86CFE733CEFC10C18C3.175EA19B37241399C17305FAACEFB07A1C5FB2DD\\u0026id=0b9b4e1019810078\\u0026fexp=907724%2C906942%2C924606%2C929117%2C929121%2C929906%2C929907%2C929922%2C929127%2C929129%2C929131%2C929930%2C936403%2C925726%2C936310%2C925720%2C925722%2C925718%2C925714%2C929917%2C906945%2C929933%2C920302%2C906842%2C913428%2C919811%2C913563%2C919373%2C930803%2C908536%2C938701%2C931924%2C936308%2C909549%2C900816%2C912711%2C904494%2C904497%2C939903%2C900375%2C900382%2C934507%2C907231%2C936312%2C906001\\u0026ipbits=8\"}], \"playability\": \"PLAY_OK\", \"player_type\": \"html5fs\"}, \"subscribe_xsrf_token\": \"V-JkAZNXVIi4gjwRIRaUyy1rqh98MTM3ODk4MzA2MUAxMzc4ODk2NjYx\", \"channel_subscriber_count\": 1445686, \"should_prompt_merge_identity\": false, \"branding\": null, \"sentiment_xsrf_token\": \"rUe1DX9B6S0kBEJwaYYRBQkgw1J8MTM3ODk4MzA2MUAxMzc4ODk2NjYx\", \"ptracking\": \"\\\/\\\/www.youtube.com\\\/ptracking?ptk=brusspup%252Buser\\u0026pltype=content\\u0026oid=3OmbD_Dz3bv1YwNAoU8c6A\\u0026ptchn=brusspup\\u0026video_id=C5tOEBmBAHg\", \"next_url\": \"\\\/related?v=C5tOEBmBAHg\\u0026page=2\", \"allow_ratings\": true, \"video\": {\"user_image_url\": \"\\\/\\\/i1.ytimg.com\\\/i\\\/eQEKFH31vvD-InkTGSvCrA\\\/1.jpg?v=4efb5240\", \"time_created_text\": \"Sep  4, 2013\", \"duration\": \"2:09\", \"view_count\": \"2,767,499\", \"title\": \"Incredible Chemical Reaction!\", \"thumbnail_info\": null, \"comment_count\": 4367, \"dislikes_num\": 1203, \"longform\": false, \"profile_url\": \"\\\/user\\\/brusspup\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/C5tOEBmBAHg\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=yvFlZe6HDNoAvIPVEiRBbyEUDAw\", \"likes_num\": 21801, \"watch_link\": \"\\\/watch?v=C5tOEBmBAHg\", \"encrypted_id\": \"C5tOEBmBAHg\", \"description\": \"Add me on Facebook. (click LIKE on Facebook to add me) \\nhttp:\\\/\\\/www.facebook.com\\\/brusspup\\n\\n\\nDownload the song in this video:\\nSong name: Monolith\\n\\niTunes\\nhttps:\\\/\\\/itunes.apple.com\\\/us\\\/album\\\/monolith-single\\\/id596457486\\n\\nAmazon\\nhttp:\\\/\\\/www.amazon.com\\\/Monolith\\\/dp\\\/B00B60NGFY\\\/ref=sr_1_1?ie=UTF8\\u0026qid=1378343773\\u0026sr=8-1\\u0026keywords=monolith+brusspup\\n\\nThere are no editing tricks in the video. All of the reactions that you see are uncut and play at the original speed.\\n\\nThis is a classic chemical reaction. It's called the iodine clock reaction. There are several variations of how this chemical reaction can be performed using different chemicals than the ones I used in the video. You can order clock reaction kits from several science related websites. You can also use simple store bought chemicals like vitamin C, iodine, hydrogen peroxide and starch. A quick internet search will turn up multiple ways of performing the experiment.\\n\\nEven though I've played around with the clock reaction experiment before I've always wanted to capture the reaction as the liquid was being poured. To me, this is the most stunning way of demonstrating the reaction.\\n\\nHere's the other version of the clock reaction I made several years ago\\nhttp:\\\/\\\/www.youtube.com\\\/watch?v=qeDhaWEEvfg\", \"length_seconds\": 129, \"public_name\": \"brusspup\"}, \"related_videos\": [{\"duration\": \"2:40\", \"view_count\": \"411,584\", \"title\": \"Amazing Hologram Effect!\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 0, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/WllhvcRH3KM\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=t18Qmilb_rFtwJKJTBCKbaRLQyo\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=WllhvcRH3KM\\u0026feature=relmfu\", \"encrypted_id\": \"WllhvcRH3KM\", \"public_name\": \"brusspup\"}, {\"duration\": \"2:21\", \"view_count\": \"2,589,152\", \"title\": \"Giant Dry Ice Bubble Experiment!\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 80, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/8tHOVVgGkpk\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=hITPLWQ4XEdyqU3OAuySRYY0jRA\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=8tHOVVgGkpk\\u0026feature=relmfu\", \"encrypted_id\": \"8tHOVVgGkpk\", \"public_name\": \"brusspup\"}, {\"duration\": \"3:39\", \"view_count\": \"3,529,768\", \"title\": \"Amazing Resonance Experiment!\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 160, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/wvJAgrUBF4w\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=jNtSWzQ8HbjFb5KQ27wggqmLmlc\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=wvJAgrUBF4w\\u0026feature=relmfu\", \"encrypted_id\": \"wvJAgrUBF4w\", \"public_name\": \"brusspup\"}, {\"duration\": \"8:20\", \"view_count\": \"334,912\", \"title\": \"Resonance Experiment! (Full Version - With Tones)\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 240, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/1yaqUI4b974\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=tOEOMdumSWc1G--uyQNZJ1_r1HY\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=1yaqUI4b974\\u0026feature=relmfu\", \"encrypted_id\": \"1yaqUI4b974\", \"public_name\": \"brusspup\"}, {\"duration\": \"1:24\", \"view_count\": \"840,664\", \"title\": \"335-foot 700 Ton Ship Flips\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 320, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"related\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/hq8j86OenqM\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=Go1pp4c_d6887ErOHp0rEfAsGoU\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=hq8j86OenqM\\u0026feature=related\", \"encrypted_id\": \"hq8j86OenqM\", \"public_name\": \"Rick Scheu\"}, {\"duration\": \"1:18\", \"view_count\": \"400,264\", \"title\": \"Ashending against gravity by Kokichi Sugihara\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 400, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"related\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/xVyYcAI90jw\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=gmPmiN0TY7CtOOafAxsBQYC-CuE\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=xVyYcAI90jw\\u0026feature=related\", \"encrypted_id\": \"xVyYcAI90jw\", \"public_name\": \"Gianluigi Filippelli\"}, {\"duration\": \"0:55\", \"view_count\": \"573,904\", \"title\": \"Sold! Nadex Coin Sorter Counter\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 480, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"related\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/vZaRgMOo-Ig\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=m3COC6q6y7FXbBlzpYCkCEEQJjI\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=vZaRgMOo-Ig\\u0026feature=related\", \"encrypted_id\": \"vZaRgMOo-Ig\", \"public_name\": \"Curtis Zeisler\"}, {\"duration\": \"4:57\", \"view_count\": \"337,612\", \"title\": \"How To Solve A Rubik's Cube (No Memorization) - Part 1\\\/4\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 560, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"related\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/dMuGAmdr8m4\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=fwyZkY1zLp5hrS1PTh9qd7d4hmA\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=dMuGAmdr8m4\\u0026feature=related\", \"encrypted_id\": \"dMuGAmdr8m4\", \"public_name\": \"Philip Brocoum\"}, {\"duration\": \"2:17\", \"view_count\": \"6,678,361\", \"title\": \"Amazing Water \\u0026 Sound Experiment #2\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 640, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/uENITui5_jU\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=3V07FkPBElUksqkiE6jhgR5mv_o\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=uENITui5_jU\\u0026feature=relmfu\", \"encrypted_id\": \"uENITui5_jU\", \"public_name\": \"brusspup\"}, {\"duration\": \"1:37\", \"view_count\": \"1,352,850\", \"title\": \"Liquid Stacking! (How To)\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 720, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/hSorsJ-lRYk\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=LePBch42wY_Icephs7Yhw5R91BU\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=hSorsJ-lRYk\\u0026feature=relmfu\", \"encrypted_id\": \"hSorsJ-lRYk\", \"public_name\": \"brusspup\"}, {\"duration\": \"0:56\", \"view_count\": \"3,869,695\", \"title\": \"Amazing Swimming Pool Illusion!\", \"thumbnail_info\": {\"posx\": 0, \"posy\": 800, \"stitched\": 1, \"width\": 128, \"height\": 880, \"thumb_height\": 72, \"url\": \"http:\\\/\\\/i.ytimg.com\\\/vt?cids=WllhvcRH3KM,8tHOVVgGkpk,wvJAgrUBF4w,1yaqUI4b974,hq8j86OenqM,xVyYcAI90jw,vZaRgMOo-Ig,dMuGAmdr8m4,uENITui5_jU,hSorsJ-lRYk,kf1xFCcvadg\\u0026w=120\\u0026h=72\\u0026sigh=c99tZpvMiwZDzKB_NwFL5pdZ3QM\", \"thumb_width\": 120}, \"related_feature\": \"relmfu\", \"thumbnail_for_watch\": \"http:\\\/\\\/i.ytimg.com\\\/vi\\\/kf1xFCcvadg\\\/hqdefault.jpg?w=320\\u0026h=192\\u0026sigh=C1aCdkCphemgOJChXG0f43WVoeU\", \"playability\": \"NO_PREFETCH\", \"watch_link\": \"\\\/watch?v=kf1xFCcvadg\\u0026feature=relmfu\", \"encrypted_id\": \"kf1xFCcvadg\", \"public_name\": \"brusspup\"}]}, \"result\": \"ok\", \"signed_in_username\": \"\", \"build_signature\": \"en:900375,900382,900816,904494,904497,906001,906842,906942,906945,907231,907724,908536,909549,912711,913428,913563,919373,919811,920302,924606,925714,925718,925720,925722,925726,929117,929121,929127,929129,929131,929906,929907,929917,929922,929930,929933,930803,931924,934507,936308,936310,936312,936403,938701,939903\", \"build_id\": 0}";

---

字符串无效

JSON

-前几个字符

）]}

-考虑到您已经手动创建了字符串，您可以删除它们，然后使用

JSON\u decode

var_dump(json_decode($str));

或者动态使用

substr（）

---

使用json_解码（$str）；这将为您提供一个数组。这肯定是无效的json。如何将其转换为有效的json。我的实际任务是从中检索url。删除前3个字符，然后通过

json\u decode

json_decode(substr($str, 4));